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 0xa4ab21f635eb4228bf06e9bc89de50fe023285a2156c447bdf9b50b3e968374b. 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/7d2789dd-473f-45b7-b68a-144dfd018ff1.json and https://artists.proofprofile.net/proofs/artist/7d2789dd-473f-45b7-b68a-144dfd018ff1.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 0xdcb2f97e0e32a1080f332715b1550dbd38ae1c24468f4468c0580b9ed9a0c1b2. 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/TCADC1721621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6413c7189ca05d978e0916926e95c694239ed51645f2dfe3a89b11af1ac03f9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCADC1721625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6f5814366a407824190611d1aa3d94f02fcfcd45fea6ee8257418abead9385. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:57:51Z), 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/TCADC1721632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57867f83acb4487a11e3abe33146b1dc8d3f29f5c07e9dbac5165d0f28522a1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZGLS1950194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5308671a3916fd8e75dee105099a6371cd817a5fd0e17c352b8d5908d9a5853f. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:24:53Z), 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/QZGLS1950196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457b92e80d662b7b430332c0e21c059f13e1fcece40d221422f293028a04e6ed. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZGLS1950197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe415935284863266275611b32345ad97510e8e6941b1e40be78b164422b3c161. 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/QZGLS1950199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d90c586dd775b160c55fbe4781106925ef2594658be9cb62ac93f506b871a0a. 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/QZHZ51967228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5c833ba48ffddfb2dfeff540a539ed448b833b6f20618342ecb9480aabbce0. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:07:39Z), 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/QZHZ51967230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce127a0173aa90aa4898a7f582b450cd9810c877405dd322b233527ee28f97c6. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZHZ51967231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455e7ff4827d0959a256fca00a23f5738b7d893450b4687b6327b531819571ff. 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/QZTPX2177932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9acfffcd45b8fdef08ca6ff94f7ad11e7efaf26868768391e27960bf3598c0c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:55Z), 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/QZS7J2323133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9616fd6277dc91d0cbc2f1fa5f1fb02cc27bba5f3df3ad37cca51c473f3b5f9. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/MXD782400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b072b58641e76e55c892dab24b907d8e8dad5bf52e3152ac34936cf7b23d813. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US3DF2448542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156d0278026028b8ab95bcc5e8243dbc6b58f103b81c14d62ca76bc30490ef5e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US3DF2469327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7051f213d2a3fe114ca1f402f4645d75474564f2e7b6646dc464267231778c1e. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/US3DF2458003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241182df7dbc2a4ef0f8b7af366d075fa59cfc41a92ae9a85eb5ed08c1b23a53. 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/US3DF2458006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93213b12498f90dc73ca0bab37a8b2e9cf7d4ec739737b03e462ff061d9a67b1. 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/US3DF2458009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8fe71f8ae391886f587f363080626de822918477fcf71afa646e461017fafc. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/US3DF2458010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff29cb87025687bda98378c93941fe4cf0dceb827f5dc0c99cc1f56e26de2f9. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/US3DF2458014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a33833d696a7bc321df3403699c0aed3f6d54dc3a09e0ad8de4304fe62f5a2c. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/US3DF2458015.