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 0x6a1b6cfead01eefce66b05da348bc640532ba4c55e523fe21c9b96eaecf6fd3c. 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/7ecc69d0-9f34-4514-9e19-585d83673554.json and https://artists.proofprofile.net/proofs/artist/7ecc69d0-9f34-4514-9e19-585d83673554.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 0x77d1e975f1eaf1077a35581ea806f67d26805a437255da8cf4a643413ddd1571. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAFQ2145308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424b2d4df8512ce0cd544d1ed9e83f63982b0af4d4c47c516edffd93ed759e08. 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/PLC062232980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb278470c2a7694ad3dfded0de725a61611f24f7d04940e45130c2eb9416203. 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/PLC062376882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61bec8c536b8aa09924fd4a2460ab079f5d12b960f49c8d5a50ddb0c298c42d. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/PLC062388993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0305a2f33a5e2649c4fda64e88d128afed4aea841be402ec7123ecc70f5d4429. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/PLC062510122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6e626896531b60393e8a37fdc182ef244af77578443c62f79a8888a917a236. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PLC062534224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9629583dc84fae42a2a0f42f811906327d87f469c2f33c6686295bab709249. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:02:59Z), 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/PLC062534009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88430059488128237f72a36e542fde72f5227f75b4bb7adaafc75cda201b112. 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/PLC062534825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7396682804caa7cde971bcb3df806bda3d4c97d54bf9ed9819a42df0fdce3a2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062386395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc250c0ebaddc25d83791891926936e5a053d36a3b345e05b3890cfaeac588216. 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/PLC062375871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc250c0ebaddc25d83791891926936e5a053d36a3b345e05b3890cfaeac588216. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLC062375871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc250c0ebaddc25d83791891926936e5a053d36a3b345e05b3890cfaeac588216. 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/PLC062375871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad003edbb5573a83d04893c715d1340f3311b8ea8008dd7582709712b9790742. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062362695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3456cc2b083770d7194ad3e98904aadf121be6853a0024e90f8e95847261789f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLC062239068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e7adba9b8eaec492958a071a91c08c8a5a7bb4487e051d25e019cde1b70006. 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/PLC062242010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5becd9ff5140d81a5749a6d0899da3e88d84f997584f379c9536d2766775fb63. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PLC062244710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcbf88dace12214df4a9153648480e9f4cbb1e79bdb0b66b3f044090d592cef. 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/PLC062252932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad003edbb5573a83d04893c715d1340f3311b8ea8008dd7582709712b9790742. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLC062362695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcbf88dace12214df4a9153648480e9f4cbb1e79bdb0b66b3f044090d592cef. 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/PLC062252932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd63862e4c0a4be3d08ec1a47c1d3e148b114a787c74238eeb07426314c6d2b. 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/PLC062247830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5becd9ff5140d81a5749a6d0899da3e88d84f997584f379c9536d2766775fb63. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062244710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e7adba9b8eaec492958a071a91c08c8a5a7bb4487e051d25e019cde1b70006. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062242010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3456cc2b083770d7194ad3e98904aadf121be6853a0024e90f8e95847261789f. 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/PLC062239068.