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 0x01d7563c260d453c9bd5f79d56af9bf99587f74767170e28bf63ee2d17a62a1a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2359b50f-03e6-4468-b2b1-9415643bd962.json and https://artists.proofprofile.net/proofs/artist/2359b50f-03e6-4468-b2b1-9415643bd962.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 0x55669358d5c614debdd4500888c92c5aa00e3a06fe3ca0574ea1c94b25ba81eb. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/PHS031100179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846c1dafc6a084605e002b8fb3c20e7e46d4eff7e4ee9137e912c92b9abb257c. 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/PHS091204419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838318f8d8195542b6299435b69e5a391665c22f825cd6dac4bbd85ef544a2ab. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/PHS091204424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3a409a136de546bb3ad8a5dfebfba3deda500474ff4cff8e8b6434043cf655. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PHS031300295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e17449dd0fdb726c8bf7d3184f19a8a53029d1836d5121d92da8d6e47a3998. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/PHS031600670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad3cc40b90de8e44b2217fb8f5ebe7aeef371bc066fe1653e47ce571f413408. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/PHS032001461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb524723ab3c2a15e65235ecc2ce564483ce080a3146b1bf33d2c3f0b8b7088. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USACX2500494.
Gifted to Give (Songs for the 500 Years of Christianity in the Philippines)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f500c8b4c79ecd5c5603997ae2adf8ee5318e6f68a53a5cf46b59f436c1d8df. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR59R2155381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f500c8b4c79ecd5c5603997ae2adf8ee5318e6f68a53a5cf46b59f436c1d8df. 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/FR59R2155381.