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 0x77f974297b570cea820ce65a9ce9f59de57807f236aa136457181759d2447c9e. 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/25d4c09f-d6b3-4936-b37c-401d49fb4241.json and https://artists.proofprofile.net/proofs/artist/25d4c09f-d6b3-4936-b37c-401d49fb4241.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 0xfc74347ea79166e57f95627b2375263ec331531768000dc02f9cb14cb14afc79. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:50:39Z), 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/QM6MZ1922528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a15639d3bd7f8ab703dd9bf4b5bd6a1aba174e5dfc97b971cb6a77150d23454. 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/QM6MZ1922532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd0899628a05a60416ce6f37dfb052756b59f4eb873680da37ce37e2bd0f29c. 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/QM6MZ1922544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599560b24bce5b0bf095b43b6fc30d39a5d2517451469864b35439ae20b7a338. 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/QM6MZ1922546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494253285c0c42f1713cf6ff971a0f23fc86a020c67ddb9e62b0d53cca5a3ba0. 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/QM6MZ1922550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbceede30fdd7b25c0e0b959f9df7ea95b65ee0afd5b46b2f04a15d280b4982. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QM6MZ1922507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac9f9a93001acdc21cf86fbf23b083f6f2e9c107147760e04e40ec3eef3c916. 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/QM6MZ1922512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec2d96eec0b73b4ab324fb7317fc4bfc031ff0784f7515f1d894aa58262f2ad. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM6MZ1922514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3440cdb9c339de5b5ffc7cefc4e41f2d2d7fdff75476970c363d64440a1fba. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QM6MZ1922478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ec5b0a806f60cb94fe3c8fd3fbe49a8a6bb961e2ce6aeaa7daee28e2e367b7. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QM6MZ1922484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe133433ea426c99c0c446aa5228fbedfa6fb2faf4d100a431b6d4f99747091a. 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/QM6MZ1922486.