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 0xed6c0c1c7997dabeafa6cdc6934b731c1f2e2a410c95b01093735d84d6bcf995. 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/a8eb2510-bf07-402b-9999-262c4bde88e0.json and https://artists.proofprofile.net/proofs/artist/a8eb2510-bf07-402b-9999-262c4bde88e0.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 0xf0da5c110543e7f1104be5d4f2fc52ecf60e7e28680b1b21179b6ff462225192. 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/BCPJV2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf505ad082d80154c60e041faac525ce3b082768ad9bf84c448d726ba12658ad. 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/BX1KG2300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936b1b3c645a63d194b316a0cc297eaae780a9b2374247cdd5e6b07ec87d9ce4. 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/BXQZW2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e714e55a249e2e7f0f2259afd8f30b397c849c363dc0d9eaeb50d8b633d23a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXIV82332740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a91fdd176c271beb12cc1c43a57632c7ea1911acb51ccd360de953fa2d1e63. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BCUBG2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb394be6e09ea018dc6cbea53d63f3ed219723760bf2fecd303866f44f0677bf7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXIV82346075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb902c146a3866966b65788be54c8a49443d694530a4658f9a6e27c0127fd6a8f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRUM72300807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc99d90a97f310bd722e36c369659a5d0d55ae6b7e476177b05f6cd65c0766a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRUM72300683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ef8651880bc37cc0ad3e364f02002dc1260814a291048a52b5915f5dafdc19. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRUM72300808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dac37296e5913b4993290b998d92029949704582f0d93b38873c2429652d68f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRUM72300809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921875b639cdcf55d37340e2d7bae2198900cb843b31fc69e0e5d368bd024da9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRUM72300810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d31e1dbafe9c7ddf69279e6279c216bbc7377165126c5429d366454ba40839. 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/BRUM72300811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d200c03a628a507902d047d861614299162bd68e8dd0f1aaddecf308914755d. 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/BRUM72300812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17c8c12ac29bc2458df385d9ad4fad79a7b0caf43206bc3c42682647cd0bdd9. 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/BRUM72300813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8856bc3b8a88cca42e1968e064c9715478cd6e44a2b532c203b6c4133260f1. 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/BRUM72300814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875f2c11741c2153de98000bccc56fd95ac8e988e7fbc9b56a39f84ab56ec7d6. 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/BRUM72300815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a26ebb796234ee07940ab560f5115589c54bdb5d99be1381a9c6170cdb6d4d6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRUM72300816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418f737362de67b043ea7a5d50f9df983b0d8954419498034473eb5ba0c783b1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRUM72300817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc99d90a97f310bd722e36c369659a5d0d55ae6b7e476177b05f6cd65c0766a. 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/BRUM72300683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376f4da1049a365b86e0272c6ed3808ac97b5b0068ab38d389931e613f39f69d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZWFK2320540.
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