1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09603faf055a71dc50399beafa83cf06bcf7d298005930c1587351ee46752be. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da6f59c2-ff06-4b28-919f-56223c16693a.json and https://artists.proofprofile.net/proofs/artist/da6f59c2-ff06-4b28-919f-56223c16693a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c009f938355e8408e0fc793326d5b65920a5c04ede1b7301aee67262fe09c77. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762300965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f664195b6eb540314561a138f2da68718797c53e78dbaff1b9dd0597e310b4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa976d7db8de60258e9443a72be775b69af26ac533b5ed7a0484b7042d83e98. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762200224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898548b4518721e42ac5d21e653a9b6fef0093a8e0469599926452542f0dea6a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762300539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78f823eb78c5d0772a297035e18375eeef99b52ac39e306c15fae910685b0c5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6877672524791981d15ee1aee84fe6841d6086bdb064989384c0bd0a91e6da64. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762300989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccfa6b97630bf64b667edc147040fee4c6b389254eb45c9eaabc92e4d347530. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEB682400290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22d738f6b77a7e83af28356ea8da0d37a8726713d9ecd690258350d994335fd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914c87a1170b8a66619934833567f13c53525af900df18c38b813de4145e796f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762300900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638691e803a479b321fe056025d9813c78e28fd6c9314ae456bcda632c571db1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762300755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba9cb57779c96ee9217ba8760bd0b2955ae1044b9e96f1d9f2f6ea1996d09d2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762300559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d1c6fa282dfc58a8f15049283a33fa0ea76f753930cb418cef1dcf067d6526. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762300447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07af0b79a89d999e37a57199c3fbcd7275d0b5c79f99f0c962410b919fe2e737. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762300346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e60ccd70b1c1479bd99450727657dc08dc28ccaf5ffe8d9ec954bc73d8e040b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762300226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04a58633797020cbbc46304705826eaa542979ff51ea99823b7e730a86ba6a3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762300117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9495123142f85ed0b0d22e5f0c44ee9d6ed9b57a1a0b5561e191d87cf76c9b5c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20888951583a9d858f795b6619a64f670f30da83aee72dc89fd930aab8f73493. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762200504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4842013895477e492dfcdc848c9400ae56b5fc64d5ed581ceeb11eee4932aa8b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762200294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa981221354ca4e329e90d2c1ae38ca874b277cc6ef6e9aefb58894757f451bf1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762200164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31358855102e7047c99b04c81f0b2c66d16774f251a66099b1bb2a60932b4607. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762200141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf5640de111af472cbee5d9ae16383d2c09a7b98626a1f04f7ffe5ada0fad71. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bb310c51519bb91e956c64763b0fe010fff17c5a6efdbd92cee0055ff13ef7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLV62114376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bb5483649caaa48a741ca38aa9ba9577c1ab042deacf6f8b12c5bbe67c87cf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762100390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfaae33adb77c55bd1b6c3cce6d5919d8f9bc8d6bd19ef4ea7b5f20bb80a04d2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762100316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf65e8410453e9ebe9499524159b3ea5c106b66698b5ce45cac17ec0e290361. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762100230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902d5787324469c27d961b017bd2e33554c0bbadc36f1d160d8b8e920b1300c1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762100131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693f6c560f9724188cdac9150d5fe247de6a849107374b09bd4d1ecb7a041fac. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762100105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80600707299aafd3a0e881e05ce34778faa86e58cee437135b73e644d1c08a1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2029b162109fd633355ee5babb538045f6afb857a8eefc470c41028cd749b3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde575a810254b96eaf56da50dbfd240f22f374e2ea2e152d318d5e371582dd6c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762000521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72e127c585dc965e550dd050b0e710d2dbdccfef84850f72230626cb27b1523. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762000445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126113d0c6fd4e95c324f5bf68be7f6a0c595116abcb322a3741c9f9e347ae87. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762000269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a75fe5622e9f765584201d4b2cc3677af9a47c81c2e0ff25ec43ac5ac821ad. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762000172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d809f8e09f1208265946a9da15f4c325fd2c54ae5cf33acde7b1fb007d68e6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762000130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2318ddf0fe5ff64350e6dcac88e1b7a81835b4bbe60d9f56960028f27ba0a0e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762000086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432e0e76af3a0ddf886147cbd1c34bb481ce674d0afd02f8dbfb91ef95fdaf5c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4b76483666162a81a0a310222a132c20df4c64e3f0b3c0f66e4179a6257fbf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS761901341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5f2418b2d02b3f20b0ee5e6214973a5c3e6c58b33650b6acbe56c2b0e5be17. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS761900761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0d1893d0e2e8c868e342d00b9902958c0b78eb78deb956b133d17a95354935. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762400307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898548b4518721e42ac5d21e653a9b6fef0093a8e0469599926452542f0dea6a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762300539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78f823eb78c5d0772a297035e18375eeef99b52ac39e306c15fae910685b0c5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c009f938355e8408e0fc793326d5b65920a5c04ede1b7301aee67262fe09c77. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLS762300965.