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 0xea77157a6e58ca459e7af15691066af4b138afa8c21c6e9072727ece8e7050a7. 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/624c5c5d-53e4-426a-8589-a6dae8e3c2b3.json and https://artists.proofprofile.net/proofs/artist/624c5c5d-53e4-426a-8589-a6dae8e3c2b3.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 0xc1c582b148c1d55833930d6b11a21166dc9d7782b4cda95004eec34a1d69b9c1. 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/UKPFE1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0c1d787c298af6b67be95bed84887e138aad8f4c356c79f9ca4b98c3cfa13f. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/UKPFE1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c15702f43e0bd4b7c82dfc6e649078ac11518625ce2664f6d8d9b24222bb5f3. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:54:01Z), 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/UKPFE1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836551b6b8ae490084d86f1f1e0775f071414a0af19ab38964608f2049db2ea5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/UKPFE1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f85c6d7d1edd2da08a2ddd66b6ccd3514f4768d09710c844cb65bf030c3d80. 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/UKPFE1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396698c2ed4479ee4c962beeab12d366bcdeaa7b375ed759c34471168d715853. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/UKPFE1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c5c8737265b74b8c8f6d4626bc6db5b83151b6c9e5e23396ddf4d9e1249f08. 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/UKPFE1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c53cd1f92ea4320128a0d0c6c22ca39174fc6651379d9850072ca4581944a06. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T23:01:09Z), 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/UKPFE1800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26133b15615e95c994ba1ca836eee544d43fb71753e0387f52b19d67ef6d5fec. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/UKPFE2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3971eecdd1dd91236d14a6ee005a34d48f750bd71310c24865db13a5979371f2. 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/UKPFE2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81177c042286b9bd17cd8e998204e0786b5fa253c1a2ee2626fd898960ae576. 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/UPKFE2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8a711cf8d189fa2f5e32de820ba04a4a9e075d8b550e661219bdc71975c0b0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/UKPFE2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d25801919ea1f5e6b464352dd750d1b78295e1e880e59cfe75656a0945c1d77. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBRKQ2227988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087d9f28fc047bc5e5e5d2fd15267aeba37e5e0edd4e5e4f478ed14ffc4c9f56. 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/UKPFE2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b3478fb90955a33fa4f2034917ec8a694c644a43a0bb89b49810457ff7a3d8. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:10:34Z), 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/UKPFE2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f13c89a62720abcf0a7a87aaf150cb3aef25651b751e65391ce4b508ac4303. 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/UKPFE2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82808fd5f00514a659505168bf6bb8fc0c81d28c76146f84cd1874d130ca5627. 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/UKPFE2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fe74a348942e376941b866ed6bc2a5bccb33ef7a1eee00f4ccf4c0b0e6e695. 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/UKPFE2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3cad263f2880a9efcebda5b491ee8239fdfb54ea235cb31c7e716a3457dc10. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:40:50Z), 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/UKPFE2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f6127a1ca8e712d58075efcd64525c111829b206b5a4e2ce540f1673226522. 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/UKPFE2500008.