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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cacb0606cc4f0c06f9986624d0b53aa2090b0716fab4d2dd61f5e36598cb88. 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/d3da1c3c-267e-422c-a67a-e19d659660b0.json and https://artists.proofprofile.net/proofs/artist/d3da1c3c-267e-422c-a67a-e19d659660b0.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7facbf63d0ea1287b8b1145e54ce712fd6a447e13e0f00dc29b9af3103799fed. 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/GB2LD2210402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65d8e019d848727141fe14b979cd28ee63b68793ec5c782db636eaea8446499. 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/GB2LD2210403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa903dc976f5b5d4747d9ab730cfe5e8c97af820d033f9a7f11acf4c21b762459. 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/QM6N22429246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0758ff49cd034a4f6c54d80aa35f6197ebc75e3c07b51078e46d4cb6c34c3243. 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/CA5KR2440707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2b9c4b101a81b7fb1923434f2133725c55617db34e29ddfcd47c5a50e3b7b3. 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/GBPWR2300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d356d7f280dcb825384af63d35b8baeab4a3a7e19a831e531d09d004cf5083. 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/GB2LD2320304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d356d7f280dcb825384af63d35b8baeab4a3a7e19a831e531d09d004cf5083. 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/GB2LD2320304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad90f6c63cec05cb8ef40ecdb4855b2036940c6b28fe5357d7d478ee53e06c36. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB2LD2320305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313b7e3a371ac3ee3e0bb480841baa29ae1e30538650f513278f454f1193fcd2. 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/GBVPL2300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a318ce4fdc64c3f41c9ff45ac3d084f82cb892d3158f5e61d795f47777c5c95. 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/GBPWR2200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d8feb8b4eae5c595b22bfc59d0fc8272503f91df7a38e1684ebda26d842b32. 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/FRX202291202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cd60c23e8eb1a912b0d9f09b768e4c7b293337219833f34470c429ec6e93ce. 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/GB6TC2210102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd1aed92646bf38957c98602f3753a5e56ff576e68a35468457ee01a080b168. 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/GB2LD2110407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e374ea726c4dd713f4b2cb9c5edba1d5df7c32a1d1173cb266221f4daf808a3. 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/GB2LD2110229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc610170c68c92161e9ce903eb418a613857e4df885b6c02fda5483b7becc372e. 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/GBXWN2100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3596b4c9fa5cb1fc9ed2212329d9936a904a2b70dd25949eb8d1b0283e56a3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMHK2068324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4da94c0410bab13dc4ee4dbd993459d52b0a0af752c039f671532e90ec32433. 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/UKFJY1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9b4d9c6135452c2fcea6971a0fc0e62667495917357717c25afe9506a74cf8. 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/UKFJY1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5779e8644abbe8df236f29f164999d7e320c98c69cac48e59ae2efe16bc645b. 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/UKFJY1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97af4e7d6cdd5bd9332a97b32e4a1fdd274fe200bbe2369f3f602eaa6bdce960. 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/GBVPL2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6c7c6742491de0f75ed9d55ab1a20d1a9c73f30ec0c2065013885996728de3. 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/FR96X1968097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1009a09797c674ada5e0e4929c859fcb8cf2456ac103035ba96584d743be261. 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/GBEXH2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434a86d018cafc6f75c82937a19634fd565c90b4b4a26d88c81d6f43b42d262e. 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/FR59R2229807.