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 0xcccb1aaab07ededd15ac60df35c23649f3de90723e991b436ac136bfc0c5e900. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08eca8cf-b8c2-437f-898b-a4d48694a4f9.json and https://artists.proofprofile.net/proofs/artist/08eca8cf-b8c2-437f-898b-a4d48694a4f9.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 0x2024a034b9bb0ea543cb1e36d094120b726df2c226bffd34fb70d115e5e6d386. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZS662126266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8292831aecb68e5f7911018dc8e7ed25a5d3a9e6d2b8ff5d51008842623bbe84. 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/QZES52324118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb069f3f5ef8066b796a3a7643ceb9db3a75d986ad9e7851c51b32fca45ff3629. 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/QZES52324119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab2b995ac38e5c354523d9ce6a9f53a34963a2380d7315d7e0edb6da8117b30. 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/QZES52324120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ce35c34693bcff842d8adfe4d17e5fdde87f85d5e86855bd2ef4e242bbd0f6. 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/QZTB62382115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c6d2e47bb03694225e302b8551f974ee0632b8778ac0b6a7ba566ed76a5874. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZTB62382116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ab8a7e3ab742a46d9b246013de7d04eb3ae0115e48cd76b2f41835679c95dd. 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/QZTB62382117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141d2f99a431f095e0ead28dc1afa2f5db588e9e01e5ec97803035d8d7c11506. 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/QZTB62382118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4859ff7a6043bd474b31d40d9539e77387ba3e58cbb3a2ba676c59959d24100. 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/QZTB62382119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7dd7223cecc2a554e64e08a29eac9ba488436d79830b1cec5bb8ca75639c9c. 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/QZTB62382120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74de68162f13d09dbe544dbb6cb51c4bd38143aad2b12398bc5efe318862bdcf. 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/QZTB62382121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a742dd9c3ea530f59a2763d622937aeb988fcec3b711d1645d45e61b549a77. 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/QZTB62382122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b0dec4cbe62ff7b9557151e5fd1790027d0082812fe824af3499dfcbe08d38. 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/QZTB62382123.