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 0x93ca8de76375caa5162dac3d98127d72cf8eb07b1749a064ecd1f944e24d2c8a. 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/4d8d3bc3-85ee-44ff-8308-8587922db82a.json and https://artists.proofprofile.net/proofs/artist/4d8d3bc3-85ee-44ff-8308-8587922db82a.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 0xce22d8d4933df559801dcf3f7267e331f7ce2d5c0e64b71c3f55d18999191e8c. 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/DEWS51800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb81cf5b62c4e2380e609df70371cf601c9b7d28a0a5bfa056db12d27125137. 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/DEWS51800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bfee8978991a352465fa147a768cf6120c4599d480f777e7ed6ed2e1f58327. 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/DEWS51800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec1544abdfd843c1cdd0a1eb5662d841cc59c2d1ce7a236ff3cb9d6eb51bb56. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEWS51800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a0dbb21a5ef7a9febdcef5204adf76abc459572054d771c7358bb46c629265. 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/DEWS51800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2a0933a8bf6aa6bcb84606d4cbd4cbac106c1372c93a06b00e486e3470c901. 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/DEWS51800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc280613407a68936d88dbf68ee6bae18d7b1b4b30bce45dcaadbf59082e063. 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/DEWS51800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792c4e6af6e2ea2a5f73f52588fe6c35e6ac7320dc3bfd0e9050bfc9ff30092d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEWS51800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7c10a44565b0ef4a45728fe297e9b1b26d7da8784649dffa1809af00236e12. 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/DEWS51800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe838d50261d19e0ea1d118a1298b33d7e5b0c357360bfe6de85586c582a1106c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEWS51800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537fafca425bc4c0633d46c7f0223a99cb2aa5eea9646b36ffdf5987ae48b963. 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/DEWS51800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b02af31935c843f90a2283505aca7dc83658dc51a86711ef7c17f3c7b92c77c. 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/DEWS51800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded2d221d9f4113f584e858502fbe5a97d4643e5cdc1a1dce85eea36d3d15b31. 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/DEWS51800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd8b4128b3c6e402aa1adcd3fb31bd343c4b4085ec3dcc94ae6ab88b6a9d77a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEWS51800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb51a2b69c61197865bf7adaa3c0c8e208c72e9e1403561873b5b490e47b613d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEWS51800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52db7ad0c8c995cec636a67e3c33dddfd62f2cae149e18ef8a4deb659af6e78. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEWS51800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad520252f7666202d5888878676ba064bef75e240afdf5667966f045f23c37ae. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEUV42100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ddc23130f7d3327979cd635cca96e8089069d8b9f24ef43ed231c2fd85bde4. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEVI22005535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7320af0b8703aa6b3577da459446422376e4232fd1a12d36eba6bce34ee9f0e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DELJ81746525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cecaa1e3d501bea797b68827908b4d63aa7c10f13bb21418d786fdd82f45c9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEUV42100022.