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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbde326dff012c8c9638b4f9bfbb3af8ea42006ff5f355161d8a68d7bd3f8ab8. 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/568a10ab-884e-4cb3-baf4-3aea62df48ca.json and https://artists.proofprofile.net/proofs/artist/568a10ab-884e-4cb3-baf4-3aea62df48ca.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4e21e6b919e307173cdba82c24045a6878e5be4a8648fcc4825a4208d2454f. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/UKR6V2510183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538838595f5d911b8276d1f2b756ee01da552ba8ae1b3651f7286ff9586f764d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T16:28:12Z), 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/AEA142114408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5c337fb321d3c00a5c1337951567152011cad03cb2306d59d047bfe6c7799e. 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/AEA142114417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98263466bb9d36c7f69b336b63fe3c056cc08bdc8f7296f677e1b6da2c89009c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/AEA142114393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb978f36eef546067f520c1259f52ae487f18dd047e968a788e337f45cf189f1b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/AEA142114413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7243943557e42364b956850c8400660dac1d964971032fa3cd8cc7ca996158e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/AEA142114404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dcdcbe37c9bed6077a9cc5fefc686d6ce3b2a66e89701de755f8d2eded8f71. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/AEA142114405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee3700665fb17a2a94419b4e5893fbbeb448cd4df267c8fe2fa37536c4807f9. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/AEA142114407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0658bee96fbc4d8ef2eddbd7bb927de7dcb73ae8d133a4c5cfa295495a32c226. 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/AEA142114390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae768d2feb60d6b581eb4222931257d4beda0cfdc18c8aea482745bd905ec10. 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/AEA142114587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7c674fd230b8030334294f5f5114bd58a4067838f2546115199930cbbab75f. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/AEA142114426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0e7acd0822869c142a1b8f4bf8268d39b85ccf66f9d116a5994b84672718c1. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/AEA142114406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8f6d8f4e189379c28318e9118a49f646e533eb26d7de557293c5032c6b3298. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/AEA142114398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d621f1853b0d34c590814066ff6ede1422f654b491a4d122fac8e4defeb201d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/AEA142114433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70c6c2c484eec182b79bb254f65e78862c9aa0ff8eb25a7656fded040734c66. Chain 2 (Bitcoin): anchored in block 956775 (2026-07-05T10:41:06Z), 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/AEA142114660.