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 0xb5b97e40797dd13959254991fc19ac72402ea46c612d46d0608e56faf4abd49a. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe25ff57-f7c1-48ba-9627-65dc56d73cf4.json and https://artists.proofprofile.net/proofs/artist/fe25ff57-f7c1-48ba-9627-65dc56d73cf4.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 0x208aba2cd5f734332e280571ec67f567d9bfe28835f269346513ef169c05dacc. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAW2365029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75ff4981136a2a4fd02e9bf3c2e03d2ef6b4ba6a0c44b35b133fe75c88f8512. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAW2365030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7456f1d66f7783a215272833a9868658b36d6ccadddb6a34808463a4a5a71f60. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAW2365031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fa72f90a4544e359498c19cfdef7f2045fc8373d1e72ec85aef9fd9f68c7e4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:44:44Z), 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/QZTAW2365032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c3364f11b9960427fb24f0ab52eab19bb530fbdd6c4aa65bccff83396bfafd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAW2365033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec9154f87fc8e032f25feb086ff607f0adbbc1777cdfd1b8d409c04ff78a6fe. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZTAZ2365152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d8b8959cb71bebe3d74e7b890ccb6985e793bf4ef37109f308db6ca4a3be35. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:06:10Z), 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/QZTAZ2365153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb571ef2873a31e9260bd27a0e401bc91f1cffdc9066fab78bd67d600c246fb45. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZTAZ2365154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35552da35dfbdaa0713fd9978bc64d83172925b1d1ce4e45dd2b57f5f55ce211. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTAZ2365155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e59350b24ef0bec774e4a941ee6ba51817c9d855dc305499e01afc9cff32a1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZTAZ2365156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50099f6f9bed348edcea3353935732e1356ab8eb31c011ea94e4636c1e33c94c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:20:26Z), 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/QZZ7K2456514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48126185c91d231b40d39f03e816d07317d93d404ed9a26145a212fc1db424a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:51:57Z), 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/QZZ7K2456515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b9599e4c88e9dfececb972670a2fb0cc3ef250f930b8eea40c89e7faaf5b42. 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/QZZ7K2456516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca98973934533d6046328ca59d30a0a525d1e90ae89487be40e976d817e8e37. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZZ7K2456517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3f30f2dc9a1885ddf7a56a19973a3d9f73818552872ed7a8b0b4d84040b852. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:13Z), 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/QZZ7K2456518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5eeb0291d84699ea5d8e24e1a1c8e8f04eb8c7fee86d8c1aaeb06c5e75e257. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZZ7K2456519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055e60725d2bd2b4b10159ac790fb406b48bf1e55665ba07f9bfeac0041ce458. 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/QZZ7K2456520.