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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41dcf63ef40c3201489f81beb7b6d91bc988d01e91069a7a3d8e35f05db49c30. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88ba9ab0-34b2-4b48-a7ab-c0354c146093.json and https://artists.proofprofile.net/proofs/artist/88ba9ab0-34b2-4b48-a7ab-c0354c146093.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5344f15bfda2379bf594d65e54f2d52b9fdefbd7bbbc0c85c3cae1c90861dd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDY42335055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2550a76b6936d4b3a9ebba98471574cb1f52e30807683454df28d25a216c397. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDY42335056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27273ed0aa65fb6f820bcaeb1b341832077a6db662c102faead1c679ddbc8b88. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USDY42335063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df08761d5e2ab1393af1aaa7e9e4a1c1ef17077365fefa0ff454ce2a30305d2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDY42335065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b6c23fe432969f2aa33c229f2109be79c28fc9f5c5f11aa238795f1fbc81f9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USDY42335066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fe65750cdb9fbf49c03aa4130cf32fbdf6cdcabecb0b7f984317213cef9195. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDY42335068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143d0c3ff88fd989449c779c25e1533ca3a651a0c7b5445ed144ce3069e5fd70. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:26:31Z), 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/USDY42335057.
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 0xcab0c9b9083c3b4ea35f79034a7820defb244ff5c4740fcbec27a81a89496151. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USDY42335058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19cef9058519c78b9e077d4770eb4e977a3b4f98867dbcc1b132526aeda4f01. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USDY42335059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7fdb4a85aa013376fc0d10e48cb86d7fb8320f3e7cc4dada1de614c6bc6036. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USDY42335060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc363456107aba5b20eccf96b46584e5c83e87145f2e02b040c12732ff9a9ada1. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USDY42335061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511950701bcd961093fe82da0b6a45373956b63f1dd32f97d0460db7bf417c34. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USDY42335062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa363c8ac18f93d08f50b9abcb75db2d02ec151d8f46cbb01b7e171d37800e413. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USDY42335064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad2d7240f2d3198a96ff591d80bdb2978a364ed7d908703af013f9b4aa3b282. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USDY42335067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94ffac7a0375e2c55e228405ddcc23d670d128203e07be2a2cbbf177cf14c11. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USDY42335069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad84eb2230f94ac38fc310f6b723bb5110dae1155a59d4e851efb8fa759c91ec. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USCGJ1999429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7dcdc91ba1162ecbc52a38854fb18938c0f4b55eb7a3032ee9aa34ea75cbb1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGJ1999430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf22b1fc09bfe496667204e6c85e59a7d57707f6c5b752d2d73a65e944486ea. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCGJ1999431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7a56e22a5b7a1dfd2cbb8a08a98496f9b43cb656889a16ec2cb5d970c882ef. 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/USCGJ1999432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3041f26e9cc20e3b8b1e78922f6a6462979d6da4e9dde270baffcc2a723c82d2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCGJ1999433.