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 0x1ea77c999ffe19ed56165d2d324d7336968ac1bef521c1063d59ca69a911c073. 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/ef1092b2-df18-4bf9-bc25-247d1dac5867.json and https://artists.proofprofile.net/proofs/artist/ef1092b2-df18-4bf9-bc25-247d1dac5867.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 0x1fecdb98815d1128574aa45684ae19b5fe0e0d109ccc66bf7a2388efefd8524d. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZ8LD1771545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe83246d9b11e3422161aa902b31b20d57541818382c8d5612549984c589db6. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZ9JZ1771351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a794ecf57e8a367b236e447cee91000c305a36ae75ba81b7174e5873dabcd52. 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/QZAPG1777887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5897ecd3d0deeb505a63f36bc9e6867bab56a3af3606faac9ead99b45691447a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZAPG1828180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5528c8df076783cc7c16c799c7d7a103edd30e13567435c86203766cc026372. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZAPG1828181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45afbedc6fa301d6f53d29d756e96a18fca3cc4827f8806c9404a82654dabf03. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:49:45Z), 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/QZAPG1828182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fcb5e2ad85208535e80c2443f80574a3e0aba976067551e015a4ffb4822e26. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFZ72040930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493d1ab8b4e45117995824c865d92c9cbc3e88a3906ac7c8487e54346f1231f7. 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/QZFZ72040933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce765e6d1cb0c1da788c7be7255444e6642984efd0201c245e9fcda385c29a7. 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/QZFZ72040934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade679d6009875aa48f38ecad6a060aa3abfbd900fe03c5edafadeab26be52c0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:27:11Z), 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/QZFZ72040935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95423109c3477071d0d6ca7d4d8a5316cba5245ebb584f5db39cf13061096ae. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ72040936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59afde1388528175caf6e28b45c97fb0f90951675618dca8b39a2395acbd777. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA72284774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f39ff85a2b7a1fc6aa11f8d955e962233a6a51ca0b371098d155f8b63034e49. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZDA72284775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b59cc648c3521f266a0f4684263298bb15b72a02512ca53fbafd7143912967. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/IEAQO2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b52590f2d18881b486669df813acb9784e53934ad2c518398ead7c4f12cc216. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/IEAQO2300010.