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 0xd8f33e19356ae331906c1521cd2db1002042f4ad3b54975725ea05ddee3a149c. 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/c1b75346-a3ae-4cb0-b3a4-a45e42e640c1.json and https://artists.proofprofile.net/proofs/artist/c1b75346-a3ae-4cb0-b3a4-a45e42e640c1.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 0xeeadf52c3db95d82111c43419b62a006bd29e5f91fe6284d8ddb24ce1428aea0. 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/USKYW1552861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e60f6f66c06433107ad76837c27689b4e9c07f12ec0877eb82a301edbd59890. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:11:02Z), 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/AUV401437124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654ad1a7a920fdf808f911e5a560e9c04efd06a0dcf0437aedd077590b0fad51. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/AUV401437125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bb0d39f50ae0a2111568575ced0c55a2182fc4e0bfca01b719944e6b69fad5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:00:59Z), 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/AUV401437126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04af3d00bbeb79177fe4e672b79933e4e624522180d48404b3bea255f8699fac. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUV401437127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742400734d2ade463f7556a7efd040ddd24a6f50fc9b90b2f4ef4add3b902ee7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUV401437128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eab28ff56219c280e52182375510054655c6836dd3756d5358f1d739aa8cb71. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/AUV401437129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689cb8c40e3e77cfb7bb7c0ed62f89c865c4e0e23e47e35aa057dab1842a233c. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/AUV401437130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b2834bee6e64a3331192f130cca09a7f9cd33af6fe87a6702737027939ac72. 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/AUV401437131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1590ea00f821eedbf1f36bb24e7dda6e8a2fee7c5f856f61aadee14d99a3a5. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/AUV401437132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86632964885a0a918fdc407c78de18eb0f2e6bf9423b98895d356dd4a466854a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/AUV401437133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4ac11080a42a9e80a26e5c260eb6e9c0faace449ab76f6d258dc5c612097e3. 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/AUV401437134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369bf3d9dc223eaab337887751f339c1006bcb36ffc8032b5f024fe65de0c522. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/AUV401437135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff284f058365918a3cacaf57d0ba90110ca20a9f5d9e71b872e79273b4cdcfe4. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:30:18Z), 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/AUV401437137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f4513a8e631faacb7995e4d22b04ca5a8fb820c6c659091140caee2be44baa. 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/AUV401436832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3a49667096c4dc8f62b69cf10440e65770ac9b8a11772fbda58e3c2648bebf. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/AUV401436837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd726b29e5e912c353050b0a1761c89f31f24f5d1ae26f143b8880ea377d8a2. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/AUV401436845.