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 0xf35c11e14deeb533b75c778b87547924e21f14bd614f541380c121f28e4b72af. 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/864f45ab-85b1-44f5-a371-0d6bbf03ceaf.json and https://artists.proofprofile.net/proofs/artist/864f45ab-85b1-44f5-a371-0d6bbf03ceaf.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 0xe9073d625923abff3af8198c84a46c903f33da002ba145bf9af303f94a865833. 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/QMFME2253745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739a6ef00c64da35846c170614197276832c73dc26577b0a3aeff7bfc8b62184. 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/GX38U2263939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df3a06ef6d07ee5612e89adab675345fcbfef976598b87735e90ad2d25a7907. 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/NL2QC2100808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be51723bb9c7aed4c990d99684211a0777bbc88e7fa618e7f25fbfa93c7fea7. 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/SE66N2360614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8748949949bb1aa815a83d09b8355edade04aed9a02f2b0357bcde3fdbcf68a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU2428056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5b258eb77b2603d0d427a39eab4d66e0f51b323160da46885fbde62105e86e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA0R2325195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec64af8043f1fbac5683f89057b1cb292af16ecc6881319e84bdf34b4eb96c64. 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/QM4TX2327928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf1fed24e86a31e118e43b93c8c1774394189ddf0504fa75bd484111ac5de5e. 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/GX3HH2291602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78e05815929b08be77265e29dd9a468fad26ba9547f39b88c66ba4f0a916e0d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEPI82433572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ca02f29e70ac19856989e63519086025daeaded848c2269fe72f0bd37bb5ff. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX38U2286347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ce383ed8103124487d74993b5c701a5b84cbd2d032aca183ff554934de1a9b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFMF2132521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe776037a26a8e9462e6252349e9e57f97251017b385493cfd56459853af84219. 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/QM4TW2186906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0930010ea9d4ea6843a707b1ba9bea303ba92a1736e60977d2f14d8fed9fd7. 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/GBKQU2463715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a645404b5886be38472f42eb4d141ffe1b79e8002a6c6e7c1daf74bb6590f5b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAFS2153581.