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 0xd2652c76173920d6ee42a403bd6a69c4cc4854c5ff1dec9f84dc0597eba1fc9e. 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/e71c737b-21aa-4692-8741-111614a7f76f.json and https://artists.proofprofile.net/proofs/artist/e71c737b-21aa-4692-8741-111614a7f76f.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 0x618416a2f8d98bd9c8a0f2d97b14bb6618c3111ac526a30f1461e56eeb31fd40. 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/BE8NU2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8132a824e5cb1a7996a87d8c6396fc6f7419af4d616afe68df4a7d7f6c6ece1. 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/BE8NU2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b2e4f091c92a37a036bed0153aaeb03b9bd4c41ccaa95b3edb1d4e67cda87e. 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/BE8NU2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e545937600dbbb5e964d475fc07b4b2ae54604ae90d6c33ee059ac1bb7f0842. 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/US38Y2419644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96865ea3cc963d957fd1a4630e44ae19159a825bc745dda2ef95a09daadd8a3. 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/BE8NU2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900720fb884fd99f6486d7fc4bc79c0c6ffe9e067836d15f5d306fcab1509a9b. 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/BE8NU2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457b3071d66c75788ffc96ac22eea185ca2c6fc8f00b810a78411ef60d59a57a. 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/BE8NU2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050cab58679c308ce647e2bbc33de804d52ce2acb7dc79e609f2b9cb2a132098. 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/BE8NU2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7d1a402bf9ac73f1e5f3a26274d3703a892818f0d526d21deed283a4170cf1. 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/BE8NU2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4f586fe7fce1ce1f681807ac17da4667683be0f706a4772df292cf6cc511e8. 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/BE8NU2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e80d19f7f8b7cab1d75045c7730b82f801d74942b0367959149e5b55c31915a. 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/BE8NU2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad18afe6757c017f7a809c455d789ee84a7c7232d5921f26639c1ecb410382c. 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/BE8NU2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f312e45705068fd78f9890ce6be50af3f1cdc88b0b700c8a2f33696333c3ed. 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/BE8NU2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d75ac36edfe45d326d2fb19f84b9ed35b92c622663a61d689f69c16342772d. 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/BE8NU2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e545937600dbbb5e964d475fc07b4b2ae54604ae90d6c33ee059ac1bb7f0842. 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/US38Y2419644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b2e4f091c92a37a036bed0153aaeb03b9bd4c41ccaa95b3edb1d4e67cda87e. 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/BE8NU2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d75ac36edfe45d326d2fb19f84b9ed35b92c622663a61d689f69c16342772d. 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/BE8NU2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e545937600dbbb5e964d475fc07b4b2ae54604ae90d6c33ee059ac1bb7f0842. 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/US38Y2419644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b2e4f091c92a37a036bed0153aaeb03b9bd4c41ccaa95b3edb1d4e67cda87e. 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/BE8NU2400001.