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 0x6b406e02bd4bba96fa88fca06a67f03cadc91e095b7934e2c090563393a7ea63. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/864a4caa-7a13-48b9-a351-20dd85892a3b.json and https://artists.proofprofile.net/proofs/artist/864a4caa-7a13-48b9-a351-20dd85892a3b.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 0x4dd972ba6fcaf1ca9c2682afdbc5d6e2af0fe5fe21a55fc51bec81b2ab443f64. 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/QZWDE2249045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855613bdb6ce88856c37f8165264aef82d85bd1508a42c68e4481843ad73851f. 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/GBWUL2447479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a5ac62dc17f80f23fb86f0e472ec12384abdc43a2f7f37be4920dc05e40e2b. 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/GBWUL2320321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870cb7970ed4ea2ed2102637e9749b02b97abd39ae393e27b49e74243ffc4a6c. 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/USLZJ2382946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c4b27c725af99b544cec1ff63cc7ef495e377b228ae8acab7cd07ea3c6623e. 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/ES5702200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9d20e5f0fc00361b0e98f4c64e71e2839f405d2976a7f08c7cad982d8eec3c. 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/GBWUL1942475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05addad7fdd5c9b15c5a8ed341dc13358ad755f1021639ec7856df75681162b. 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/QZZ8A2475142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89b0fccd1779ab6be05e3aee6420812dcfd1ca6d00b93371d88ea31c1b3c5ae. 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/ES5702200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12411bb251e1a9f7bcb0e166ea5fa47b876076c78ca5fca2903a8ddac7141a3. 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/ES5702102156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fd65b92dc85c0aefce964877d649ef3184c66a1eab31e7bf5a451ddc6de53f. 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/ES5702200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f333458602c9805278eced1c57ae766d85c6d38499e2d461d2c2a6e88fa3a00. 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/ES5702200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54da1bd6c0ae9a529d3fe02b9fc46eb55821de0d46132f45570547d1f9dd8c6. 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/ES5702200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0baea6245d8bf1318b4ad58063f269b46bd30e08046ceb79ffa0b9011bf24c95. 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/ES5702200119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e85dafe6b2512296168ea75217fd0ed3e8b2295c824b8b889cc1d85a65dfc9. 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/ES5702200120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bd81f9c0a14830b5efdd3669f089c3cd047ac66af01c6df04184d82558208e. 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/ES5702101837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cca1c38d38bbb40a10a37b0cd0008e56338f2ddf47dcdc31d7142159a3e94d. 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/ES5702200121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0680cb613654746d97d090b5a5e2065413be58f34b44413ab56d69086723d8b. 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/ES5702200122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c4b27c725af99b544cec1ff63cc7ef495e377b228ae8acab7cd07ea3c6623e. 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/ES5702200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000d72e5a3981d50b3c5d52f79e84424bc91f11a053a55cd86028f0c3c2d4bd6. 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/ES5702200124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76058d3978a1c24e461e64fda12e71b201a52d7e9a458e97e7cccf812d92b43. 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/QMDA62244877.