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 0x1b22b73418ca24f251ef55a401264e47388937a432f72069e97c032fc4a0aa8e. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/124ab811-d906-4ff8-b710-1e7854b089b8.json and https://artists.proofprofile.net/proofs/artist/124ab811-d906-4ff8-b710-1e7854b089b8.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 0x7b2d445c4c59d9bc931dd479c672a2c553deeb33841c7f18124dc1fc1325751e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GXF9Q2579795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a90c717264b67a2f49f54a27dd28c7d5b60dab62a8de7dd4179a0dc1c083749. 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/UKXN22539427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c37dc833d6649cee0695b7102747efbb4e3a5efc0056707f59b7619ae7d966. 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/UKXN22539435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8dedb239cc9e5efb0b5b4f51ff7b65144d08088ebeffaf6f4fd615abf50a2d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBLFP2501983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2192dce11ab052eb719e752c02ed3fbd92e1c084bc52242b7db5c73154ed97c. 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/GBMA22532849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf16d3e8bf3202800c788a6c5f8faea59a1aeb3a29408b7114e1bc070cdfe95. 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/GBMA22532850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a44898dd4d1596d3ff751c4399fe81be2131ee7ee6f1fe8e15abf13ff9fbc05. 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/GBMA22532851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9429f1ff2e60d5e5f834da538e54d35a0e5621157d7dd0393ef198794e964f1f. 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/GBMA22532852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1147c5a37593929cb9b7b6db24355351266ca9508ed1eb80d75c2e5d7fa1ec8b. 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/GBMA22532853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa6ab0f81de9c898197bff6e483fe9a90294ce380c31250c5f47816689dc2d9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GXH2J2550854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60acd59347c57d75244cfca03c8d1da19cdb84feae792b8202238180bde6cd0f. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/GXH2J2550858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f00909820c43f86accde8e364d2e195fe81d5f4b0a981a8e2055dec957daf1. 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/GXH2J2550853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b4a1a6f5a7d17181855906c7214564363c5cbdd52b435821d4e86894a0a101. 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/GXH2J2550856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f645c30164805c0230f2fdcae1c026a2922d3f60b244181441e024590fdf20. 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/GXH2J2550852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119c811afa4ee2c5be306f6b543e7ab1bebb5808c65e66c9644b45b44a77992f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GXH2J2550857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93296e7b5e58b86c2b06839ed6b7d8604cf180cbce4511cd238c0c23198651cd. 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/GXH2J2550855.