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 0x85d8e667dfeb0506c869228821beb2af1c2a1a981f4cae0e85158dbd586471d0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/521d852b-1b24-4fe6-af40-510c9fbcade8.json and https://artists.proofprofile.net/proofs/artist/521d852b-1b24-4fe6-af40-510c9fbcade8.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 0x6fbbbc55a61109da16b932a9b25651d43e147751460bb8fb05725e4b89497742. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/INS1Q2301941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeee3cfe8b5fc2e79328c44a44726662684dd28638ad9c93626fb2b835ca5913. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/INS1Q2301951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9097e14b84db1492ef402bf58b547c5ce54f7683d599d3018d5ebe43bfa98d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/INS1Q2201780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964261b5cc5be0baa8f55f09c0547f7861faf82cfb2817389be4adc7651bf840. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/INS1Q2201784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbbbc55a61109da16b932a9b25651d43e147751460bb8fb05725e4b89497742. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/INS1Q2301941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b9a0d2a1c1b692fa6c9e65d111c9becf30e069075c7bde089431e23d940b23. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/INS1Q2301950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeee3cfe8b5fc2e79328c44a44726662684dd28638ad9c93626fb2b835ca5913. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/INS1Q2301951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a35227d3f356142bd1f904fc9906940a19903e4cb2751d2c720dbf4aebe5963. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/INS1Q2201778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9097e14b84db1492ef402bf58b547c5ce54f7683d599d3018d5ebe43bfa98d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/INS1Q2201780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e148c1ba91d2ee710a716e5dadde8af807d4d9d6e4547d8aff9647f7905f951. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/INS1Q2201783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964261b5cc5be0baa8f55f09c0547f7861faf82cfb2817389be4adc7651bf840. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/INS1Q2201784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c3108fff1afaa4ccd59e40c2330dbeb304097d3dc84c226e01eaa32a59fb4a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/INS1Q2201792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272fc355a8e536dd7016b3e2a99c3da75328f50659ec06d977da10d2f5a3f78f. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/DGA072127627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a800d746a6142d57e88f86cfe14a114aa976bee3118233ac8c73fae404c889. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:57:43Z), 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/DGA072132325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73800de9815cfc3f752a614fd3df6c5eb0c66a6398e3fe7dafe0e529ace6e4c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DGA072138488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bd2bcc7388b0bf0bff478de3b2d93dff0d622d4731e5aa89457f690d4aabb8. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/FRX452100946.