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 0x5850dd274d8b1ab7e6d3a4627b4113161fa446ed847e7975ac41b5f7e1d2012f. 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/df444f51-ba26-4b7e-8a3d-970953dc72bf.json and https://artists.proofprofile.net/proofs/artist/df444f51-ba26-4b7e-8a3d-970953dc72bf.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 0xcf83dd53a5cd55598710c0069300847cc600980c02d19ce1b89f98a71288f19c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM4DW1723385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f795176f96c3d13f2ea197cf161385179feba9b6190e038250dae61654166e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:41:24Z), 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/QM4DW1723387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772db462a512eba16557dcccf02bfc370f020b8955ddcf1bf4bf6d8087bc5797. 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/QM4DW1723389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2439bc4edde334df1d6548d7bdbff75b113e89e878d90c986a9318fa4e6fdfe6. 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/QM4DW1723391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf57b48bb63aee162afd62c0c1c30c6dfe7f69954d7bccd515897676341a812f. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QM4DW1723392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b069e76079ed6487a89d249310b1ef4b492047b3b32ac9b8bba7e699e399f01. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM4DW1723393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f23686def3e4af2d7545bd5e22ece0557066c4682b31d7416cc061d0569b9d4. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:06:55Z), 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/QM4DW1723394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605736b35e33dfed3f7f21b9cad5ffd63594818f46c27e566e00e55802d80c78. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QM4DW1723409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65497421831e5ac0bae50c6e98eb4c811377a72ae7e211da0ce9fb71d22a5ad. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMPKX1723196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4496c591fa07596e743eba44b842c1e074210cb47d27771541ec1ebd1447b10. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QMPKX1723198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970456c7c6a0ecc33a7234accba90a7d3b1e68ed7718ae3e075bfd0dc3316326. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QMPKX1723202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea027ddd4b390e87944c9ee548841544b45d90e5bc2f9352f663d580b8a1a27. 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/QMPKX1723203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbadd6026235a9be9a20d4637120147a1e3019bd23d240a316b25be7c10214c. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QMPKX1723204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78eaa03bb613d66594bd906106ae2311f5142110f46bf273c96e3ade5a5c385. 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/QMPKX1722783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffe081c9810926bcaaecf8d9a70d99b3346e3ec520fd7643fa65e95832e3727. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMPKX1792602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44babd33cb2ce1165e20723f65c2c6b25f81ba16784c816059b168665274d74. 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/QMPKX1792603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee68b082d8c0696664533512947507ba4a2f737d41a7d59106caa4b618d150ad. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMBZ92086936.