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 0xe5095317aa560ed3d3df838908b913f0d07dd196805abd0c48cc0b0189edd80c. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca3386aa-b809-4aac-a0ad-497a9d1155e9.json and https://artists.proofprofile.net/proofs/artist/ca3386aa-b809-4aac-a0ad-497a9d1155e9.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 0x53c7c5d32ab0cf520348f9ab0899de12c87cc1305aed015b6279f634bc628ce8. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZDA41879455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4bc4fdd6635701756ca868b1220d71707508d858d146ac99cdbf3112eda4bc. 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/QZES51908726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77726518ffd365799a004951da2ded8987b9b1225ac69f24e3b06aec1b066d14. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/QZES51908730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3619c4f8e6c68d28f38f357ff8a3fff854f343ff67c74d1b3aabd3cf5589fd. 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/QZFZ32096007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3214ab98b6ae175d327e669ded84b2bcdbf2ab104aefb4689ea3aeb6e2bcc9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZFZ32096009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e381e4d7b3e635eaff963940a3a512e484c408f9d9dc208e596d13c28d4210. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFZ32096010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8878eb4d79fdc74a587867b32ba5ab735ea1683217942589a7e867c77baa1b2. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:06:26Z), 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/QZFZ32096014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa773e09273b9c20167114da4f351f0d9b7e17d0e34f977b44e1641142664b7d8. 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/QZNWY2555822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9c57ebcdbabf04f03a8a858f2db2635e969281fad15438db94aa8b6c8141fd. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZNWY2555823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e0be3341a76c1cbccdd70af604b455038f08d21bcb42e3d36bbc8842dce7ac. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:52:57Z), 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/QZNWY2555824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c7b631bff762fd7d0b6fd83336bf01a8d72a8d4cd544e101d5cb95853a83b0. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZNWY2555825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f4db57369f6a6bac1dae97eb6d0d62a1a54e8816a2974780f4a061649465db. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNWY2555826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228cc0ed8ac25939214b3d620d76d9b0d9ffc761b35de6a5be07707b50b8be33. 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/QZNWY2555827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd05a349de4d930bc8bccc33d2ef49fe112018429ac44b220ce75b009f92200. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZNWY2555828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5154c9ca6b97b04ae534512aa9ea3dd8018ef2a77e38aeed5301fbff617cb7f0. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZWFR2517766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eacbfe89b96f083014724c23e324d3a3c16978696a4744c326db20854dd44fd. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZZ7N2579744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3c661285cd7889cddac4ce4a1608a8985e3cc82a5f4c27543aa14e81f44dc5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ7N2579745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c1181ae5ac4ebe13ebc429d0b33b1bde5737b7c7b06d9ca102a499f2bc4c07. 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/QZZ7N2579753.