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 0xc7ec7fc26264846c6b12230b18f7adadff5e8a408de8c49240fa9f042012ea37. 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/c6188db0-6140-4d87-812d-621a5777f0a2.json and https://artists.proofprofile.net/proofs/artist/c6188db0-6140-4d87-812d-621a5777f0a2.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 0xf1454fd6ddbb639ea64bd95627de3ba426401b64d633367d5bf08faae1392c4f. 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/BRACT1800054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe342d2ab4ff18823f46bc2f702c61dc5ff17d53e7671e6921b45c94d58a72b46. 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/BRACT1800055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99757231a9528b2b1c59d7794b23795760af910f8376ec6d2877d47039cc9f16. 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/BRACT1800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc223fa677dcf1d5c52ee1f0b8f09afee54b8c40ac78f4fe8dd0a2c982bdafbcb. 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/BRACT1800058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8edddcde6b60460ab910441db1d8403a4af39e658af5d5e5a30d9c0c0efcc2b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:58:24Z), 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/BRACT2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593beb576e9d5e69dae98b4e97c859dec1252e504f6072b08d6b692736c2d1c1. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/BR6ZV2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7f21d5e338cef5cd64745201e265b1a1f40fb63cc294678c0a5cc24a2d6330. 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/BRJPA2200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fc8d93eb3adcabd8293291d9a66f03403956d0990d1362d3e2fbd55f500a54. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/BRJPA2300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b1974f1c1f44f9ca2b2e21df1f84982c67e65e486426b80c72d7cd4f719fe4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BRJPA2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e23f3f9026d71e5b66d418aa29adb2e0b572ab3cc2aa4f744be3b4254e10ef. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:53:11Z), 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/BRJPA2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f8d3041f210515bfcd64cafb6179ae00fe2f9d514825216e321d170af0067e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNJY2432892.