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 0x488b9c26b0cd02b2f2614d8f8d4b73527497a23b32d2920ef6810d8ad24536ee. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4d4f916-cfa4-4953-8766-03aa0c1731fd.json and https://artists.proofprofile.net/proofs/artist/d4d4f916-cfa4-4953-8766-03aa0c1731fd.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 0x34b3ef9ad0b4532e36cdb054cebcba807527e83cc4ae578a7aa6447338b42fef. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QMKDP1800132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323ac39e7492c67a6d126d7b0108cbdae5d71e74d27ef102c11e847624043833. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMKDP1800133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd474ca5854820583eb15ee9dc39243ba3b9859cf51bc33ac418ded3ee5962cf1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QMKDP1900148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a298de957a598045ccdb47647533a67716fce1c7bd2e1b4ee7fa46811339260. 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/QMKDP1900150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3728b4b298f1618f153836dc31033334f7f0c77c1b335592160ab84eb502354. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMKDP1900151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21073fdf7dda1a79cd453f220b24a5f29fd4eac904d2c98c0006c74ece57410. 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/QMKDP1900152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6efedd24f32af4d1b00a7d1b7302d56aa7f00a4a3179240d855bf690fc3b85. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:37:03Z), 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/QMKDP1900153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0697637cfbe1b6fb8041a9c221641f20792ba3f50f16f9cb60a5e595c40a9d8. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QMKDP2200197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e9885d30970c8d17b0313d92ee0bf1625a9b4048f7b38e9f6572f288a4dffb. 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/QMKDP2200199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9baa62c7a73af4072499ecd6d33c7a4093cf5bea11ae686f8815ab66b8312f0d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMKDP2200200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba9ae3bbe1c6ccd8104e6d62b92e0d72b1214f17381c5691954f38dad860795. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QMKDP2200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2459939187820bf9c8dc1ccd0acecd10011736da4a0f1b443189f38e34d739e. 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/QMKDP2200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3661a448c91d2d9dcfb7950d8b435cc30b73e6921ffcc09283d0f6842f29894. 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/QMKDP2200204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd980b9d7632e79e39a57efeca01cd5a206404971bbeb567ea502edacbbd3d87. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QMKDP2200206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38354b2d7d42d4e5facc45d2d06b7221667c2beadc806e2f89c1a596ab7d127. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/GBLFP2223190.