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 0xafa915d7f8f0c43f7f7861e04a7d47199c30895ae4ae1986a613f7c515651274. 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/993859ae-2ff6-43c5-b948-c39e21d966a2.json and https://artists.proofprofile.net/proofs/artist/993859ae-2ff6-43c5-b948-c39e21d966a2.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 0x6928ea568deace73d733c3b174c2ffadc5f7f5610e093985875fd2f80fcff4f3. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/ES5300716189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a261673f4e2a56350ab8d005ea08f1e32d74e155b21e0afc602cfc59583933a. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/ES5300716190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73dbacd2565d6269c94706f46766097c6c39ee8da1e02b0ee8dc308c74f53da. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ES5300716193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab89c087718f61d59aa387ec2c36c8138aba196816028bbff0896bf369e06d7. 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/ES5300716194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd107145927ef032a15777229aba2f99fd15336bc576d9a7280b1d9e8001f44d9. 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/ES5300716195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadd60eb87137cc7cc79de37d901fdd26937bb86036d16c97c6413a7dbc03333. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ES5300716196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd001f869ec05b12942852630c701d330bf7a9718b53619e0b547464a5fa1bb30. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES5300716197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b87c68732730dc342285a95c415baced7a411f0c3a1dee791e22f5a1229c74. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/ES5301140518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050751e023bd7b7448b19eec3636fd1ef3eae15717ae8ad15dda9d56d36e5eb9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ES5301140519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e1151a787fb0fe7c7dff1949d91365840fad5713cc8e591d4b3542aea01776. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES5301140520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f2840a2f629288988a7778d0914574affc80ae759c03908fc9cda01c726925. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/ES5301140522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af8b34a25ed4147a65c7c957f7e2002467114d6ece00b67a220c4ec056caaaf. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/ES5301253142.
Antología del Cante Flamenco y Cante Gitano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec999d1d7e9b5a630b9b387bd2b60b0476a361aed67f41cbf75aadd3e4a9ebd9. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ES5271305805.
Gitano: Saeta Gitana: Entre Dos Hombres - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978cb1f80738a69d96d5cb0ee8547e7ff7803d83abb18279bc2eb5fe77541247. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ES5271305838.