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 0x2347a4c7b4d48d7a77c5f37f436fcb269ecb08570d4754cf4a15213fa6c6393c. 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/809da9d4-9b40-4818-bf37-6894ecddba1d.json and https://artists.proofprofile.net/proofs/artist/809da9d4-9b40-4818-bf37-6894ecddba1d.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 0x906039fe12733ca35bf8ef771ed185770ffd7156ef22277ce3e87ecc09b7e288. 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/JMA340900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e727226d2528cb5b35d88a8b277d213942ada35b6cb343667533ef4e1a68292. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JMA340900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb41d8bf82c46733fcff311d8144a734c70bbb0ed8dcabbac3abec623406d53. 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/JMA340900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1398c02457347f47c4e082e16d3369c7809138d1deb3bfb909823fa32727081. 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/JMA340900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c46b4a2ebc66c36420aa8a87fe06bcf82504d763975913564666f2d3e9d03e6. 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/JMA340900034.
Hear Them Crying (feat. Richie Stephens)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8be9049931f98ac2cc74648e3023fda71a85756940aa2b166bde67ac7911056. 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/JMA340900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe3b426ccb98aedf99e4b73223c6cf43164e62ff6bb759a3259fdc3e8acdf05. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/JMA341700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf2fa65ec7ce48d5f51a94863675a34a424a785de4b29a700b1a616ce6243cb. 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/JMA341700004.
Mi Bless Mi Bless Mi Bless (feat. Jah-Lil)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08320d332c24871178ff1038b1e9bb469cbfdc720e7da31307ba7261ad81565. 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/JMA341700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd0bda23385b742b8d72fcd54d601f6555cc247af3162cf43284a0d82a0d7bf. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/JMA341700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee621bd86c8ff805c22ec045cfba90958974f61995a2fd1881b1a8079ab9c267. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZDA72506973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af537c6978e4d9f600e3126cc168662630f50fd443b5ab9a6a08df99295de37. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZK6H2527769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e1890be9db94afc1b41c1065f9b58fa99f059789b1cc94de881e0987fb3a86. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JMA751200002.
Mashin' Up Da World (feat. Junior Reid & Prodigal Son)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb291e5d01dc4352209da16e5eb56bd3c22e1ea961b01578a7912b53638fb1cf6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USVI20000412.