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 0x04fb563521d28e2e0ed292d5acf6f63e861af9f29379e5a9090d3b08ba3d20c1. 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/ca25c99c-21cd-4910-a93b-3311929a6b18.json and https://artists.proofprofile.net/proofs/artist/ca25c99c-21cd-4910-a93b-3311929a6b18.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 0xe2ac897e2a5d72732bd05594db2795654734f2a54a13982dd1d299df2c92abe3. 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/SEVLW0800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5657e8b087d81f71cba0a9f9b5a356397e86a01116179bd30f95a206683a04b0. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/SEVLI0818101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6219d5e61a52da0d98ef657994154a853a7dfbcb63faadcafbf3a11fa3ca9894. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SEVLW1400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6eab76f284403eea5a832269c78c5d9567984e1d03b6991a515635506081eec. 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/SEVLW1400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa172781e76bff18ad2354ef521eb31f255fe2c145e900a4242f8a77398f2bb0c. 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/SEVLW1700601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ec30bc6cce89a7eb2a489aa8450732c6ee67087665e500bae21d4540a88f27. 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/SEVLW1700606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13aa4c39ab46d2f0667f63151e9f8052fabc876b1edf2215d150f30fd21ca9a2. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/SEVLW1700610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7009320f0758843a4e064c387156bad165de5358713350d512ac1851f216ab49. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/SEVLW1900302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa033a558a7f22aad7b9615fc14c3c51f200e1b5d8dad271ab0dc74a146e3c47b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:12:13Z), 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/SEVLW1900305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6a8a297e07ea5585b382ee8787e8461352aa2af0e3ab9fddca7bef706a5586. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:46:42Z), 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/SEVLW1900310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb37c4b1836c7a22a04fac628439c8844bf6a9ca5b2538e011dfe8fd1e92cd4. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:59:57Z), 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/SEVLW2206001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f4c2eb52d7d41cf5b888673ace6b48729231c649718d405e04bf9a8039234e. 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/SEVPA5003703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730b24c27dbde9011eb6cf829bf2dd887fa9e028119725db624574b140af2b70. 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/SEVLW0400111.