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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9d96ba98b6453f7cea8afa0c8eef21fa9b060bc1d4258826a136e0901b0d2f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29bcbc6b-7058-40fa-b11b-c2bd10b455b8.json and https://artists.proofprofile.net/proofs/artist/29bcbc6b-7058-40fa-b11b-c2bd10b455b8.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eec47e06f007a88e0913804032c09693b6959bef665d17427d8d6e0b74d3fd6. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FR6Q11900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeed54f37f7f7bc290b6aa7ac93da8fdacd8b96ca264a936bf879152549fc1c8. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/FR6Q11900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa6e6f838fb9bc80530f7d6b31fe90cc9afd40c19b00f72ea264da09871f255. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FR6Q11900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42aa506e29a8543825f3dc924fd5d167b067b698bd0c9fcf0a906e68e010734a. 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/FR6Q12000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c98fbf10855f07b8fa2727da48e39a0fdf22e0aaf55ad47d601281f165f4db. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/FR6Q12000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97125993867b39abc937579e6e5dae3f7765d448f3bbcdfa9e4ac1f36c11b33. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/FR6Q12000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6302d1ffc41231ce99342a68e54463f6326bf432e9b4ac6405bf3f6964143b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR6Q12000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7aac8619b3f190cee83a32030fc16be2213558b3dae61c15407757574d5d344. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/FR6Q12000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb7ea6b2d4346fdcf3f8a22f3aee00284a35f4d831b0e398793a60770461121. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FR6Q12000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb1afb79d4e8a1315e137a4241ed839d5c25b9b75a379c8abca54b8fc5ac33a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/FR6Q12000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c98fbf10855f07b8fa2727da48e39a0fdf22e0aaf55ad47d601281f165f4db. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR6Q12000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c5343fbc9f84cb363bae8c38ef4a6ee7635db7b501e52ae3d42a8db7b0cdeb. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR6Q12000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5140cff3389824ad6bb6396eb8b585dd6856828ac5739a680c1a939a2221606a. 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/FR6Q12000051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e6b11d8ab26705c52277e552bff59c607527247f35e1a66012fea2e00eab52. 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/FR6Q12000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fa5b22e0a1a4a4756ded311da216d4b6ae6f5cb2bdd72012e706534e95f5c4. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/FR6Q12000054.