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 0xc2e83cec9901a9e6ac202e674e73933a5b9645058ef361ee507e1bdddb81e0bd. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8066b8c-c9e9-485e-b88a-838b236fdd77.json and https://artists.proofprofile.net/proofs/artist/c8066b8c-c9e9-485e-b88a-838b236fdd77.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x646e06f161c5ede0c38e8ab7c2a856e4d8a47222f29f272fb40fa4694f067fe9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ISB111903104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0481517b7e2a84f607f2f2c0e6b09585d074a7658f6e63a48cd5670561e528d. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ISB111903114.
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 0x7e860328f2917817b4478b35b0acc7592449793fbf64079d038b70cffc35e4c3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ISB111903102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e7851e16d22e87a8c084a262195b1603bcef426ed53a3b8ce79c4bb062476c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ISA108701205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1291fe1e5660e42ab170e21dbd0cc238e96f05091e533de9c969075722690e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ISA108701207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483fdfbdded0d8a936e8908276815f30119c53c4acafe5ac1b4ff08c82640ffc. 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/ISA108701208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea764f0b8b7b77ab0ee595ebc02a990957cee045b2595d4bddc8f176e0e5cad7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ISA108701212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1498ef48ff9657c7846fc9a9c04b6c82e35593eaf1d02f1455d3a3a10306eab9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ISA110604404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92679b841d7d18224770b2b6d1d721b3c1f0d783cd702a2851849b80b497d2ac. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ISA110604405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1e9e018ce1bc2e2c0b69c98b4cccdd1384d859524cebee19a57b0770d22887. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ISA110604408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6467b63fb88a1f0faa4c3ebbb1fba83381ed9a8f5af3e0c8681e315d909e5f86. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/ISA110604409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd443c4ac06a57f4dc035fc8c49fed7c2e18246b876e0c9933c71c8050d284cad. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ISA110604302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f26eda53de77d94c8143cb8be6d0d246a1fba1e99b0df1b7874800c5e4a4c1. 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/ISA110604303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c0a96b52fffe1febd7826bc12ffd893d0909d20af831d9d1565fcf616d67a9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ISA110604304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e29ed8c6930865c6516156f622378d4098a1a21d62b7dc9cdc4e82db131d16. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ISA110604311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97e0f350e888a26416e881e5ce575c8133e0883a8eadf2505178984444a29d1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ISA110604305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca576e61d0c993b5d97999936e3212f0b6f4d466b0ad6dc03dee97d25577301e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ISA110604306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa857ba357580307705e183519f5d96d7d4c8d737a063b12d58f2c5dca5b1535d. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/ISA110604307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993a1b6f8f21b0dabce528ea5716caac89ddab18e771e3d290092e614904ac7c. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/ISA110604308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c43e9264790d49ac67f624799d46832653c071dd557a7dc3ca4ab0e7845d38. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ISB111700304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903cce22469abfa8567c93f1b7254e09dbb814d8aaeb31536ea6e1e2eb1eb79c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ISB111700309.