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 0x70f65b22a89fa5811cc539e69592fcd80dc3e0ea30fd1b3d8d54b643ce040958. 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/8254fdf5-e7bb-4b2f-90d7-4ad5f9f20a3d.json and https://artists.proofprofile.net/proofs/artist/8254fdf5-e7bb-4b2f-90d7-4ad5f9f20a3d.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 0x2376241625ff811b2ceaa37c23e17220045f8006f820e79c28d3d749515ccd77. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DE1FB2300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e8efc7bc3c34c6d8726f8d0bc5aa1142997e3bc5f80987a20f3baf2efad378. 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/DE1FB2300226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2376241625ff811b2ceaa37c23e17220045f8006f820e79c28d3d749515ccd77. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/DE1FB2300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86eded1f6bdff5de4808cef9e95dd22afb3759493380fd6786d83e3540c0e4c2. 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/DE1FB2400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585042610faf78ae8251f59d9ff70c6cd6effbe46f21ef36d3641423c6a61ffe. 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/DE1FB2400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86eded1f6bdff5de4808cef9e95dd22afb3759493380fd6786d83e3540c0e4c2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DE1FB2400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585042610faf78ae8251f59d9ff70c6cd6effbe46f21ef36d3641423c6a61ffe. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DE1FB2400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a0b9626f85bbd5765ef11aa995ce7017c6151d998b87f3c7f7064410d14996. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/DE1FB2400262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2376241625ff811b2ceaa37c23e17220045f8006f820e79c28d3d749515ccd77. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DE1FB2300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13085802c1853d795fc2de2f48f557b38debcc668871e2691547958156f9c904. 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/DEZC62453937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c04f009526bc818c72a15011588960632f8e3319f511e5842ea565859220a67. 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/DE1FB2300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426aa8a2bc10df2fd2b0687a06640867cd0cb667f96998eff46c3360be244488. 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/DEZC62213803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c04f009526bc818c72a15011588960632f8e3319f511e5842ea565859220a67. 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/DE1FB2300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0cb994f3ab3143e92a4c1650af7ebdc8b4c06e954824b3d666ac95806ac4d5. 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/DE1FB2400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0cb994f3ab3143e92a4c1650af7ebdc8b4c06e954824b3d666ac95806ac4d5. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/DE1FB2400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426aa8a2bc10df2fd2b0687a06640867cd0cb667f96998eff46c3360be244488. 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/DEZC62213803.