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 0xbff0c0cff70b37dab0030884c7d8a279951cda60db8cd9f379add7c42ed639e4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d77b3d4e-1afb-486a-9cdf-cad6b22bda71.json and https://artists.proofprofile.net/proofs/artist/d77b3d4e-1afb-486a-9cdf-cad6b22bda71.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 0x31500649a305f1eac0c822872b91b886e7951077cae87b8c615b97716ed4de8b. 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/USUM71702468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca03c0963b44ed5e812c4bf609bb0de1c7998a877f27d91cfca1e59c079426c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USUM71702469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18f0f73aa0518de0966d5321bf93ef68bbbf6b459570afd438cc5bc32b95d81. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USUM71702471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b769bdf2c86bb12c0f054794802604694bdd843a04b4f5e388761c9a029514. 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/USUM71702473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50996021b35975b3bb9fb65b462031db0a65c446dcf4212cc443c12d6713ad17. 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/USUM71702474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82ee9e51d741cdff7ce0fae4985665c059d50450eec99913072390398479c33. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USUM71702475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fac7878ef6d3cf58c2d7338209da15cfa74989794a351c834dc6e5a98b08d8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/MXG501900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a830b3237c834220e5756b51cbcd0cba260044374397469daf2316f6820b040. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/MXG501900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae522598f6a1e36dea97a251d8d785238e0a00244f1a12656eba691bf07f3d3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/MXG501900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5b2625c9fedcb589fe2d1c81ca1fc4f7387b8f57520a6b13652b2421651b8e. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/MXG501900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f8b91b7e20b9613d2b4acd43d811b34bbaf5203046280345e83422d03b78fc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:09:21Z), 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/MXG501900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93a3cf6a341d6bea6c8bc4fa53831b552cfd852449ebdb4e4eeedae2de0f63a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/MXG501900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e02869d5245c2c018b0febd175270b239bddc470c04e9178897363dc06b41e8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MXG501900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783bc67aa204433b1f45f335840aba5847b608bce25bc1dade5b195a6716e669. 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/MXG502200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77cab7fddb5517360c72ab86c1a0f69eb243fb1bf27514b9f899487d12cd5de. 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/USUM72301343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e37119c022cdf02eebc6cbe84724be19cac751d4994dbb1ecaf8cd9aad346f. 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/USUM72311491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b68fba5790b64b0f6cdec223cd63004fc3d44f8695305ed2702257c60dd193. 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/USUM72400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b74400efa148409bc46b500e7d9d91e7b6b80e50a0c8b683dd30d1a9f4b05ae. 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/USUM72404000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456f4eebd7a226e83296cced12af781df93d08537f1fa8db9e3e7f26e5bf179c. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:16:29Z), 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/USUM72309282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b68fba5790b64b0f6cdec223cd63004fc3d44f8695305ed2702257c60dd193. 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/USUM72400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6e5c5d3bfab1bbab4d3fba272c379a46e68065d8e8d3e67fdcd0cbf67205d5. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:27:26Z), 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/USUM72220095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c6947e23bb5b70acfe98be527043241a394aa3e695387fd3ceed35a21b79dd. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:41:53Z), 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/USUM72315007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b74400efa148409bc46b500e7d9d91e7b6b80e50a0c8b683dd30d1a9f4b05ae. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USUM72404000.