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 0xa5f5d3dfa6efbc704f2d00cda6b187d07269dc64a53eb4ea041c998c6a6b2a89. 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/ad488372-3efd-4e3b-a0bf-9d3f14ce1c01.json and https://artists.proofprofile.net/proofs/artist/ad488372-3efd-4e3b-a0bf-9d3f14ce1c01.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 0xa258065a76c4e169ebe696bac210a511f62b83192fbe05f4fe78947e6187295c. 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/FR59R2509380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df3218bbd251045bd0ffccbb647c081e939dbefbb6129a803bd812207215c33. 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/FR59R2509381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b61df6733f9bd4dac576fbd1fce30b69150b13c18e7ab2e90fe6cda50fe123. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FR59R2509385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985271302388bf7d3ceaabc60b9cfddf9b54659d53cc03ca1477967536d808a3. 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/FR59R2509387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2049009400c1cf866ebf6261fbf3c302e4e9c4406991e1c4b2ea7213bb6f7e40. 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/TR0510600858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964b880f3936f1c51d7e10879ae3086a2a5ab4492223c047f527bbf4b7de50ea. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/TR0510600862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5600ab8a1ea9a2c5985cb33416c943c3ed4fc2e497960d4fbc9bafd2d9b36f7. 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/TR0510600865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8ff38afb68d8c55b19800471691240a01d2c2e4372e04c086bc25ec610fa8a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TR0510600867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34bbd7ae562ed1155d9a4b032554d2ce8d638ae7314529c92dbc6446e17c4d8. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TR0511603975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa642bb1dbbd4faf45983de6cb265b074c06363179f2fa601258c8fe59b40fdc4. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TR0510600594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9788b9f2c26a68fd4476189407d9b3242c2018b602300fde510c4e742fe9c741. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/TR0510600598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcadd2bf6b13f284aea3dfaff65eb9a429be031f0e242bbb7a564d03593cfa83. 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/TR0510600599.
Avaşîn - Konser (Acoustic Kurdish Music)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ed94c502d419990d9aa82292b943a522ec1e8affe72fa5d07ad319b894611e. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/FR2X42265588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbeb5e6056eb82e5c7cd309e7d03b5b5599cc71feaf5216a936bfd6bf8060d16. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZTPX2250355.