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 0x6275d2c25fa9c21522cd80edc1a3199c08d233e2e53f20480cabcbe80d4d5493. 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/02bf0827-c311-42ee-b4d8-19064ad306e7.json and https://artists.proofprofile.net/proofs/artist/02bf0827-c311-42ee-b4d8-19064ad306e7.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 0x5f439f8d73c9ccf32f0557f61bf20ef75ab3fdbf8f68fb8c526a0bf98e3aa12d. 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/DEWM92200629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb696b2a2ae7a996ec9154e5af9e70d651e05aed912e2691808becaaed8dffd. 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/GB2LD2210407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6413830aae954ffdca8d4e550376b7b0a98f4f430e57fee6088d38a3bf3c23b. 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/GB2LD2210176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01b9361cf245637ef067700748e91bbf7f822545915a5f62b1f827d5030d731. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:31:28Z), 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/QZDA82293960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88a34fba1a92639864370f8c376fa904b99e62b75bcebd117a79f548a02a366. 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/USA2P2142439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe735ba64ecc423d10aa0cf0dcddf4e52e9b200108b460c98e601d7718533cc08. 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/GB2LD2110245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedd1c5fec9db46c3c8d0564c7ba00c20d23674f3f59774332814c7d41008b4e. 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/USA2P2125990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee86d9df9a441108469b916b3dae3789b461d6e004ce338d9e639ad778a6fab. 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/USLZJ2151939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0c9517d5490570e9f3bff95e690fa2300867282ccc6d9e231fe37e81de43a3. 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/USLZJ2152774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f4e0cac69fcf88e81b3bf0b05314dffb9876e75bffc9a7c5889d8cb8a65439. 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/GBSMU6127837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847a72db62838fc916fb413941e925c27a3ca3f653408574f06e16a4758b0a87. 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/GBSMU5861039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ff6cbe7b1cc33f18d487e53a51af11cf504f1e690955001078718c27423944. 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/GBSMU5632297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa034732fc7b14bb3648f1aeb474d142f9708abece8ed79134d07f8a1969baa62. 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/GBSMU5470051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb55c96b8dbf17b3468700e73998277961e183f3c304d927e93ef60d8e219c0. 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/SEUM71800127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612ce7d153b72be6c4d577536c99e7be736412722f165d345fb20b02a6717fbe. 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/GBSMU4732829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dacc620916e498a191ba6fe23e62088f3de92a3a4f6d0441a727bada3046d04. 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/GBSMU4732827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cf066aa465c80858b049b3d525e32cc09c91586df65ed9e4f0f55bbfdd2507. 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/GBSMU3951569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5067975afd7b85d75928c712e41c33ad7b60ea16f0cacff4eb9ee76e91b818. 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/NLP1X1700045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa307c03e6fca0a33de2954661989a4fc6ed4cdb58e0e1b7ed5c81c9e99c58b2a. 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/GB2LD1700116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71588cffb6d896e870cd68e9f35e67f8387260150afdb7ed49e42669e01b024c. 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/GBSMU3444228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaee61aadaa0306eff4b6d5c1b7c9cd294014e7eaa600c791e8047737f6ebe6e. 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/GB2LD1700043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb4a877f8d84d3488e219f76ff227e859135eabed8a5665891b0f4036b78723. 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/GB2LD0902476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9e17a920bd9d9d9b0193993ab9aae31656803b77e64ffcb65cfaa90751da85. 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/GBSMU2886157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09b89f936ca0d43ed6fae49c813ec43e21fad0870b263f8e8f9013f0d757ef0. 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/GB2LD0902337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859b8c9f277d7341c8f6ad5d086409c68495111319cc8922bb3a4566762ca24a. 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/GBSMU2623268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677a723dc6d60bd589b896333f283f34b070a735668afae385654088f5ed5404. 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/GBSMU2490286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cf866b95488e3200f5aa7a3388402b378f0dfbbe55c93b1c9d97ec65c92884. 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/GBSMU2423815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e9f2c8111829f20dc9bed0c61f28351ab500989feee90cab3dc4e66044eda2. 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/GBSMU2376284.