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 0x60379eb71e885ebcf25aa32c287690354b6e930be34bdc6c1390472922e61ef4. 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/2e64d117-8bd9-4587-87de-fb1cc96c6558.json and https://artists.proofprofile.net/proofs/artist/2e64d117-8bd9-4587-87de-fb1cc96c6558.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 0xff4a57cb4c7148401a2cda7a66b672debef898ad358bc14e8a4664876003562c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ES71G2009016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fd236451b47ac15163df799768974652dcec483bfd0e64b079956e4b61f963. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES71G2011390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184e7397765fac82502cf74b97b335a6669c823bb254f90d9fbd5fc3d963c5c1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ES71G2017250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a95fe896a6c6336ff14c276f521cf5e2e58b5f0efbe0ba5d98c483cf1d696a8. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:05:30Z), 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/ES71G2111206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8d4272ad1dadffa25193264ea821b8dccc0dda04c82fd55f97549ab1844d0b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:55:29Z), 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/ES71G2137224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01150794d92a1872c21e7187b5da12daa4837b7439d0b0f802bfe80f6dda94c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES71G2237401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec54e8c18357df0dcae7f56ada6e928b15fdb965391b1c3cec961adced396a63. 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/ES71G2406015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875fe308494e88eaa34c650aa7aa6f2002250112ba00a9424e05be3503618b54. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:25:54Z), 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/ES71G2420502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8463c99cbcdb9a4155220ee8f43a50027e229c20d3545075e80eed286b7e3223. 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/ES71G2502640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30bb775a9c45aeebc7b85694bc31e7c644f99ca542a1a059fe31a8b26c12a22. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMZ92048686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df216fdfc4cc0937ab9aaa1311ebd4bb7b25f844defbc756c8711c4e4c0919b. 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/QZW9M2467637.