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 0x0e94625a94cda3a72b2417e67ddd61d9fc89751195bc4158a1ece8d569926e86. 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/36a29dc3-9cb0-4421-a787-9344b25a9897.json and https://artists.proofprofile.net/proofs/artist/36a29dc3-9cb0-4421-a787-9344b25a9897.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 0x36c43be738ab9090e27421afe42bb01137ddea3319b0c55bfa8f617e2519ff2b. 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/QZTB92216201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01897d046fc886b80009f1d6da7867343a660893cc40694cf0ccd026319f2d98. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:56:58Z), 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/QZTB92214944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fe53f5f52800f3b71f9f4234357c796b6be8ab410d1c56102e2ba9f3c6b788. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:04:25Z), 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/QZTB92216198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2a0d3820aa892d63784ceafd9acf3be51a800c6097b88d5d0e28746a460991. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:30:46Z), 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/QZFYZ2349207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6691c533d80365275af1620bf795741973fc8382de05a2e406bf2f510fe22457. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZK6F2315343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4bffd602f961c1a4fc976387034b1dad60baafdc1b353ef0617f1fc822d746. 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/QZK6F2332624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd16b93edc89b168463a00545f7a816bba778949d5067ee6a48834f9ce28115. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZTB62375873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5827d70d8e583adcb5875371cf70ee102ca80f5bd8d34c84d85c9bc6117b55. 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/QZTB92318000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3c981ed546d47f704f8a1770af154f4d5019fba7f38258f4ac5e2ec52a6429. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZWFP2378069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c818684c68d16ce2b9321af0bb9c7cfbf141784f284c19953f6708b4b12fb3c. Chain 2 (Bitcoin): anchored in block 957692 (2026-07-12T10:37:51Z), 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/QZES92437889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dd5f69b2f1cd25957159c86168811e578dac2df4ed2b86f5a11ef384fe0e13. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZHNB2435867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f46e3e46bf98400dd6f4be3ad694d1d2bfb377c32b59ed0bfd7e9bbe74e272. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/QZTB82405766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948ceeaf800aaf724ec3b51db45d05fdcad244858a26be3fae8ca4dfc5374f80. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTBA2433106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6511be738d14ec8879d661d745a081dd162cae0bb126e9ca3939ef5219106075. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFJ2434057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc6179af4c3b5122e3f2a76d545b138c64ac1ab51b4704cfef21be28d01ee54. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZK6N2585393.