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 0x0cb59a91e1184b21da894791168fac3804ee4ae3c2e409dbff7320050b059a77. 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/f8062730-a137-4be3-a20d-2e727cb3d8eb.json and https://artists.proofprofile.net/proofs/artist/f8062730-a137-4be3-a20d-2e727cb3d8eb.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 0x95b234159c7d13bb665b42dcadd240bd017ef59c834b73eef6638b8c20e3c16a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FR54E1102036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd21a8a0fa8fb147310aa29c27eaf4cf14958cd6ba334224d776dc351243ae1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ESA011977869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacefa40940d58eb05dbd4e1f278fd36513c478078c93b9787b1deb84ed023ab. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ESA011977874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc549fc25ebdfe358ff8141540095018bd749861d9b61909ea8820c49b54cdf. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/ESA011977876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce776bd8f7e3f552d45fc52efa6c9066e6f8c1e110f5cc49f57fe4ac4ada06e4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ESA011977878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec4ea223ff063d2c9cce2e72f7ffb474b981bb0063ff80ff3735ea95d737b20. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:51:38Z), 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/FRX628085020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24acc9ec415b1e8db87fd57ac285a23f2924f520c08cda4882158aaf8a8935ee. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FRX628085030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c339885761b5c558821e5ddee4a175999e923a27450905f150b3f6b6e97869. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:13:58Z), 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/FRX628085100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5510daf549637c03049da5ca66350f70dae0281bbad2b5770ac2969a27f1bc8f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMDA71561555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14044dc5f5c50a3d01ba6d06594e1891569133f53d69ac31a089920a68feddb3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:14:14Z), 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/QMDA71561556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69db262b883b363f6af8af14c9c1bf2b30553fafd96264708fde272cd2f9352. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMDA71561557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eff0d0933f136687cf4a4445feb1b60cc9d9a55cdefca1fda67975478eae696. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:33:01Z), 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/QMDA71561558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd50422e389c16526e66b22772dfa5257b350e6a0e39176d4ec4696f693829e6. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:54:04Z), 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/QM6N21991615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45eb7d5fadb38966cbe168a4ecbca8823fc1b399e1a5e420ddc2e144f81ecdfb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM6N21991620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075a7f65dae628d8dbd1cddabacd22df5ff1ca91dbeb546249545f5244fcd157. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:17:27Z), 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/ESA011977871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394514cdefe018ae5b0260c2163bbbb4ded5b526a9e6a504fa22f8b17b6bcf2a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMFME2028765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1113cc57a0bbb3c2f4f8101c11f3c4ac742a51ef841b1892074356d86abdef. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMDA61320488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32a914581936f26e7b9052882b78e778b4c6d545717cc7d1eb81b09211f917a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/US6R21427276.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch