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 0x3052bc666eafc9cfaf8b4b999a52a1f754e7269d2b3750d04a64666d57846d3f. 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/e286c331-df4b-46ef-9158-9becca4871af.json and https://artists.proofprofile.net/proofs/artist/e286c331-df4b-46ef-9158-9becca4871af.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 0xb0b910f367930ae9f3f80e16f625c2902c6092e75526ba160cd866efb8314fb3. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:52:55Z), 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/TCAHU2480183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5e1bfb595ea2f75d4375a3e992b1800c58a8788ce1e98c1fea05f4da67f433. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:28:28Z), 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/TCAHU2480189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647a19533d6ccd6e7b44f4c6c69e0e8c3633607b8249233a5c349f67fa9166cf. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAHU2480197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b2eae7769da4d7d251e4a192e8a330bde35b1db349193794a065bbce78c0d2. 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/TCAHU2480208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f652305e52014fc093cb1d0f63cf824f6cb8823eb3f5bb6be71cd512d097f14. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:54:45Z), 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/TCAHU2480216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b63a8bdcc57a78efd76b554ffa423a8046c36619ce072f15a76a570133de42. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:24:10Z), 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/TCAHU2480221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15880ee6b7f1ff38976ad7f064fdaf5c361f7e1bd1d8e0004855b4e302b76f8d. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAHU2480225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4b7b94d5cd68d3d4fbbe984c2d13ae4dd65235ca304bff965ee3310c64950b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:59:52Z), 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/TCAHU2480227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdce296f6a5be0bae05a2cc2c5cef80daab7c6e500b82886c76569dac0fe7b45. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCAHU2480232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f1b91ea23ffae276dc0a88666212b956a07520fb027b8336afbf53c239f1a9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAHU2480240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa0b0332bf14ea6b13b593747f79110e1b40abffbe40a2a44f5555018c9f3d8. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:06:00Z), 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/TCAHU2480249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a1a49922c787e4915cbb445434c91735d094ed9c0e3a8f13c25db2059cff7c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:42:29Z), 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/TCAHU2480253.