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 0x6eadb0a1f2ac96b5e7df02a0e624397d724c5546fe4bf5f335fa4777dcb2e8e1. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef76caeb-6d39-4406-82b4-988b43e978e7.json and https://artists.proofprofile.net/proofs/artist/ef76caeb-6d39-4406-82b4-988b43e978e7.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 0xe1ae41217f55467ae12689ac5ff665cf411b7bc6a98a8676184567a250ebe143. 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/UKXN22295277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97617586b27fee53d7a6a85bd486d1c02765c144ec37d3465cbf7499fca29785. 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/UKXN22295282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90b3bf74c3994afef0732c7deaf13ef6093f1d6b5e557f51f599dfaec72c641. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GX53U2017454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed054e15f522bf456a10dee644fbe8f55115a57b7b69ee5c2e79fc28d1d5c71. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GX53U2017458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32057eb63fdbe424dd029a34e4c9ad93a0e70cc8ed98136f3e9d08c667aa326b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GX53U2017461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5b3ea9770e45e0e46529016d9864b69abe8e3695590ee56f75feac1a609198. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GX53U2017464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4ec3af95daf5bb877ed57bef81aa591a25cafe6517675db956a987a27cf4da. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBLFP2471323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c1f8956b211e28c6b6ebc536f1f7b5174513445270388e220057e9db519d4e. 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/GBLFP2471324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec3f59aa8b034ef3283772f2da6a6f7ca08b0d64a8a86f84bce78fbc6c3caf5. 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/GBLFP2471325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf9399bebcdb43a81cb6d23dad876d24cf01d5d76a82d270359a0e1394447b2. 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/GBLFP2471326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb010abe9c9a6f756855d37999d1811d246085d0f55365c93fbc51d9893371b. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBLFP2471327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa515b08fe2cdea945ffc9d58442a5beb0b7ac22521654b3fb12fa0e74c24c2. 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/GBLFP2322656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa9ec77e07bacee79626ad4c9dbc9194fa36e3e774bc8977f87016efb17fcae. 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/GBLFP2322657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4df7b108524e65c367fb0fed4119e9e687711e0ee14eea21827634426aaa2f. 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/GBLFP2322658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5172dd8e618ec11e28ad5edfad31f008dee8d178063e962d63d60a7e4da30e. 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/GBLFP2322659.