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 0xf8afd625c66df6d482718529ec6d2c7be33b10f49a3357066bbe2a7c819ea02e. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e86896b4-adff-455e-80ac-8308e61d344e.json and https://artists.proofprofile.net/proofs/artist/e86896b4-adff-455e-80ac-8308e61d344e.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 0xd315cbd25c05c8e24bea97b7661d608c98c6006cc59ad60d38f2f47fbd526917. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:22:05Z), 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/QZW9K2355361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811dbdf1e77b409f4845fc5bbbfd42610ff3fc1e96361863e5ace11eb4c7f4e2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:07:18Z), 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/QZW9K2355362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fdf23515b106fe923fd72c37b1bfeed6b9fa12ffecc0500df14eae30526262. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZGLS2492103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f40a2bc9bb507819f7693ddfa843015d6008d27cff34301b68d59d2a741d9cb. 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/QZGLS2492104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f2a5029c9e27edabb8a3eea33e16191952631e63d843bac95010cb7c11bb48. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZGLS2492105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48640330bf06c1d048810bc3d6f7831931a7d40b93d8f8cbbaa9f549e3211497. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZGLS2492106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786f5fd5359eb5cc3757583973a12b8871e8abf47ecea9c1a313b613dbaeb946. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZGLS2492107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedbcb1f415a499ac929a2451f2f24c827d4fc8361ede81a24d98682e3cff052. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:07:50Z), 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/QZGLS2492108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed03c7913251e79bb0906d65dbd402bf1c7f51a3b52580a1c4c2f576d2b626a6. 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/QZGLS2492110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6970d4154a5e34d8c0cf4088b6307af4d6c633add505e0e58f90bac4e810eeb2. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T17:06:19Z), 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/QZGLS2492111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51a8fe4f1d146711e8a295a77c6b45f8bc29c7ba0dd05bf7e55b1920802220c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZGLS2492112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3b2dd89aa82ab99d71c451950203c51abda21461ea5309a0b77d917bd5bb8d. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:04:52Z), 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/QZW9K2499225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dec99be19b5102c116c66dee039ffa895716d1038b97a3a68c9cae4542c705d. 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/QZW9K2499228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2572e494b7d7644338d87343bd349b5a1ac3940f418d0957134d29501eee0e. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZW9K2499230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f60f7d94c7f523464194558686867e0731cb24c90403a345dcd1e728a31660b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZW9K2499234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca9b277b41ca107db938cf8af1efc3e6b8b74318f66be7afef1d7830ed228ed. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLM2557600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bf4dd92f11aeb4b46ed15fcd70fa4222bb1313c9cfd3a27764f55863b28bc5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZGLM2557601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49bfe7e10a05b44a77b1edfefede557ca599539db079f2684b9298a6c1154c5. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZNJX2500748.