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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dbfeba3f62fb4733d576d9ef77a1213e35e91677b6b14f88c0925af9505687. 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/9cfe33ef-9e84-4e2d-a01c-73d4644c7e9a.json and https://artists.proofprofile.net/proofs/artist/9cfe33ef-9e84-4e2d-a01c-73d4644c7e9a.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28a610b01f470ad8077ccdf1d8c52479d6735398b7014626ce2b94b27d82aa1. 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/TCAEO1955211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e259ee91225278928b076df6067dd38037952cb9dee37dea63bc1ae8093bc51. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAEZ2023961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa006c264c40aade5ecd1a6d68e77724da6ecd35ad90b98d51e25603401af7dea. 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/TCAEZ2023972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd75f56767a02f3bf5904c116284c500e730cc40a9586b07d0202012c499555. 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/TCAEZ2023984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5cd39398845cb25c337b8a6177f9264e2a79ebe78e5896a41f6789ca6fe474. 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/TCAEZ2023995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17091c321b9fb66eba156c8f9a91be55b23dc18df991b8aed487f89ab2f8d048. 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/TCAEZ2024006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fd5a9ae2133fe0d9159a8b073e21d2f93ace15ef39d56fa3e64fd5729293d8. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCAEZ2024013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8765f88dfd344ba4176d98fb744c982da32e5f7b55e8e86e420f4bcd463fe712. 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/TCAFQ2115544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a9191ed7bb943a5b01411ff5b80a33f4364d629176bf432f93824b2dbd4e43. 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/TCAFS2173974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee52c59255cf077d7a3ae41c199d4434a50d6a7e0e3de6615584ca0bb68caf4. 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/TCAGN2271981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4195a117b6f756af372ffbbab9d3c1337ccce5b98caa4949e4fcea1713fdf9. 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/TCAGN2272097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552f206219d12fccc686d08e002a84924168bd244c3b2f6b98a4189b7336ea36. 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/TCAGN2272134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e6eb2e8fc50b4a6e77fff28e466f976a961cc30bc9d113276b7ce4c087cf4c. 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/TCAGN2272143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b02f55d66c3d573c1046eecd45aa745bcec17128f094fe9a31a391d342a52eb. 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/TCAGN2272157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2c9ab4ba678c2be8c669b4767ba0db9aa3b869617b412abe63f6bb3ba293f1. 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/TCAGN2272163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec0ac8c83c43f0fb0d735b1d708344bbbb4e859e7c06dea74168daae7bc9bad. 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/TCAGN2272178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85392f7aaebd1cb7709669472ffa29578437c37cd19fb89b8b4063a3f8e5ff71. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USA2P2305751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa643a0de581ce46d824c59a2d0533826ae472b993b2909cde38927998ca096d7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USUG12305024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fd14117bb05d893d38e3861eba56daf1ca283df1d432989853d5eccc6cc4b8. 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/QZYWP2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf88c9fb37115e2c73fb6ef9f5c5e5dbf7ff1e35c2aa3f73e1db1c0ab7eea0e2. 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/USUG12402159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf88c9fb37115e2c73fb6ef9f5c5e5dbf7ff1e35c2aa3f73e1db1c0ab7eea0e2. 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/USUG12402159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028d4bdd68649daa662e67cd5c23b722e73f760810fb7893299e6889f78312bd. 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/USUG12402294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59f02887d1020ea8116374162163f0b5a52dff2a6b60c85cf8a235e36801b54. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDXS2303551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0045a6b8984b39212bcc2e1555ae6fd2791573acc90ad9740516e5753c7c9e66. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZKDT2201395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8228cd22e1faa4418b89fd60d92132faec049c7ca265080f9699fba1aaa0745. 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/QZKDT2200937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724032781b1b6b24b1ac4152a3a8f592ae31d96537ad998c42c49d23605909ad. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAGR2205637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa643a0de581ce46d824c59a2d0533826ae472b993b2909cde38927998ca096d7. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USUG12305024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724032781b1b6b24b1ac4152a3a8f592ae31d96537ad998c42c49d23605909ad. 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/TCAGR2205637.