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 0x9af5c1a13d80d26660283fcab93631d699a61adc7ca89064e2a3d3ff9647299f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4d6eca2-b514-4b2b-b245-af097e51569f.json and https://artists.proofprofile.net/proofs/artist/f4d6eca2-b514-4b2b-b245-af097e51569f.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 0xd67af4d47200c32bcf82d1679f832990f3d97aec571e6d8adc514fc4da935a0f. 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/QM6P42325610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494814330933bc35b51741e0c98e28aa54e2de0078dd7752147dc9140afc37a5. 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/QMDA62206433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb64c13305df1d8059f0e69516832cc3a2fb9d13d883a4c3b216676fff69bb4. 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/QM6P42326255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43a66f24a1b66c3ff11cc4d979dd5ad87ea4e03a369ed13e432ccd9bd2e2600. 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/QM4TW2352963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998b6fa6082cb7cb4f871927f056d5c820ec8915aa0cfb78e15b8e3894ff62b5. 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/USUYG1393107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0b1a16894bfb87daf20025cae7b69ee58a6195054f2055a5d671981d137619. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USUYG1408796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28399630ced00c65d32d8dffd5316f39033d2e76066ddaa49a666b0b5c4490d. 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/USUYG1416070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b99aeaf113c01cc2c8aa88553d3642a3a219a4676b71afaf71f866ce71a4193. 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/USUYG1416071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f9aac0ab741d37b65595fcc8cc5319e8d6fc94517a3950b4be497f18996087. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:43:01Z), 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/USUYG1402330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b75a709e1912c9c798fb72f8690070e15e9e2b9e26591a7ea7de94350b082e. 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/USUYG1387240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98366c95d884aee928fb501d536bfdc7cad92493bb70072b3d66792fede8f2fb. 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/QMFME2312998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43a66f24a1b66c3ff11cc4d979dd5ad87ea4e03a369ed13e432ccd9bd2e2600. 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/QM4TW2352963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494814330933bc35b51741e0c98e28aa54e2de0078dd7752147dc9140afc37a5. 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/QMDA62206433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493ed7e4e313f0eb63923297b4c0f601f09caa2e750ded733f535674d8abe5e1. 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/USUYG1409018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0b1a16894bfb87daf20025cae7b69ee58a6195054f2055a5d671981d137619. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USUYG1408796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f9aac0ab741d37b65595fcc8cc5319e8d6fc94517a3950b4be497f18996087. 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/USUYG1402330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998b6fa6082cb7cb4f871927f056d5c820ec8915aa0cfb78e15b8e3894ff62b5. 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/USUYG1393107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b75a709e1912c9c798fb72f8690070e15e9e2b9e26591a7ea7de94350b082e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USUYG1387240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2240c3717c38695d0b5260a2c8c80da58ed3996229f4941fe40b95b32cdd3330. 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/QZMER2099137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d285b306b352ab28e87841a5d67f390f610f6bfbbe760988e4e45f32960f1d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6H2050735.