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 0x09592fd16fc21c673de6cff9f8bbc341deed20d1ab9620d54b4234d045dbdc61. 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/ecd3a722-24c9-4d34-a1ef-469780b12fd4.json and https://artists.proofprofile.net/proofs/artist/ecd3a722-24c9-4d34-a1ef-469780b12fd4.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 0x630b6a13d90a1eb14454d93f5620bf815bed8525c700418818a61b040a15e11f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:38:15Z), 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/TRAKN2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d66e968aedd6fcd31262e0196d896e7b60d378e0983e1172f7d876c42365c4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TRAKN2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bcb2ca2fbf76c560ac215273299605074acf75ccf4623848c4ad1b951f6686. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TRAKN2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5994011f4372f2d15155242963ca861f22c05fce0f05ac4ee67d1409c0daf11f. 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/TRAKN2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ed7ebd2c982181abe1be5f59c1496bd56ddb5ce61210353dc8cd323c78e6c2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:58:50Z), 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/TR0440600406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e86f323bc8efa1b661268864e09eb6991f988c0de7b8cfe3779d860c1f90668. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TR0440600409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa79881a2ddd3cc61ff2470205e91a9ea9eb234a3913a314c2c213ac9f49f8f. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/TR0441005903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29177ff7b1b0c78129f263ed52589a35953c31cb03e338fb610a272b3488a550. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:37:15Z), 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/TR0441005904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ee79b9b339e67b64a645901bfe5384e2563854c093579951b33d89424992dd. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/TR0441005905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766495657527291ae9069be9a9d10af77d8cc04db2e5a6882e6d6e812f8ca8d3. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/TR0441005910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09fe4a97e14aab18f59e84309e41389779cf8c1179419f71e372544c72ce46a. Chain 2 (Bitcoin): anchored in block 957634 (2026-07-12T00:26:43Z), 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/TR0441414107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe700e8b0d1f789969acd1f26642d600e9b993facf46ec3d20fc6d837780d4602. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TR0441824502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc0aee24c3e430674f0f769b5231a29605840b4a0be78d1376a9a2a13b9d733. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:44:45Z), 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/TR0441824503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef9d8d65e2d1b94f15aad31a8b101de1b8923bc6e4a706b334ceb516a883080. 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/FR6V81749175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeae857b76ee01bc70e18a71272d872c64c0674983b2d980c956f7e461409558. 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/TR0061400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3b13f282d919aab1c510220348800b729bfcbdac1b6ef13ee079f048a00ed7. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TR7801800205.
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