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 0x33310ea1973456a9c2589f339ad50d97774958324cfb0e4f27c02097dceebcf7. 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/155ce0cd-a736-44c0-9a30-658c5a6f0872.json and https://artists.proofprofile.net/proofs/artist/155ce0cd-a736-44c0-9a30-658c5a6f0872.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 0xd009967fde94ec5a4bf4ecfcdfcdce157ff20972f4bd71dedb17857ecedec108. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/TCACN1622610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae9527360315aca002b7341eccead1bde9674cc06faf903a0ee2718745b2947. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCACS1629202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4e155cf99b54774fec4f0e329cde18d08c7340ce80a5d7e3c735e095ef6144. 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/TCACS1629227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089293e3472adf306771e50cd1831efc19591d22d73643efa9e7b2a3b62dadef. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCACS1629230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8249d4f3bae67988b403b59f5d105116cd05086b8eae4ef46690d4a5eb1440. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCACZ1767646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98cd88509f4c4f7eae5442f826af67f41f735ae63f9123628fb00242e1641b1. 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/TCADP1837993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b95844eb5eaa9efe8eac1628f8fe3e4d938a75d64927965ac1cfa852a238509. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCADP1837996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425520cb8ea50c2a3306178167f87a4fe663d7e09e8797256e0faad1aa58a068. 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/TCAEY2070256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82469cd308afef3c2933067690d9aac8d65533b99a966a71bb80b31484bb114e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAHI2357703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5a4a875978c49b2d874b0fc77f2f9b7ee461372278c83252a0072adfa4a4c4. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAHI2357710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10361e04f5da9afc480e7e0bb24ad089b528c00285e567a72d9380b5b1c63c1b. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/TCAHI2357716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221b1e6e89bab3a47316ede207c79ed5a7c82421c4a9cb12b21118bd96148a8d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAHI2357722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea3cdc6f0834d3600000aa09abf40260e13eb0e8fc57a7835310bc3e19f2560. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TCAJS2509790.