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 0xa5c7705a47ab89d6cdd10090e6cdf300bdfa7616a295347da88f39718176025e. 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/035c490e-cec1-4dd6-93b0-af41714d32c7.json and https://artists.proofprofile.net/proofs/artist/035c490e-cec1-4dd6-93b0-af41714d32c7.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 0x14a6533f09ea5e58d1c1961e43c9aaf84e9e89a60743a2703b10b2d5fcb81183. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/SE5Q51800679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fc191c0657caed90b9c7738e4ecdeebb81b54308b3b7c36698a905a49fab58. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:44:47Z), 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/SE5Q51800680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b9d05d7354c7f20419eeaf6bbc6e5d3f07095cc9e0db1561fe886e564a3aa8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/SE5Q51809936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ecc08870b85be0a8fac0b29a627cab1803bc2fb328214bc605912244bacdb7. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/SE5Q51801118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2623c2db8da0e5dc0baece43ffd2d15767183316b48cdaf5decb250d4160df9b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE5Q51900610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1c89ea82ce460164a9422ddbe179fc238be68dd3e5a4b9313cf75ed289be70. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/SE5Q52000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd50e6d1e5b81d60d884be528e39f47d319199e3ac0cf91f3749bf3dc1caccd7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SE5Q52004182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6086bc114aca7903f8c877c554fbbed29add6cdfc1c831611827a85f35ced3c5. 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/SE5Q52201764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204ef963bd28c9c4b70cbcd377a20e21e09fd9f09a0a4dc316d9099f77faf16e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE5Q52203253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edb43e0443b2aafc910d2b96a1feff409769bd3d0f8b39ea520d063e6be1740. 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/SE5Q52300454.