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 0xbf3f03a95c38b19105d2ab6771ddaff6ee4ade875be8ad4a36f52ef0b4e60edd. 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/3cef9e23-5688-4b6d-bb8c-8c8f61c23024.json and https://artists.proofprofile.net/proofs/artist/3cef9e23-5688-4b6d-bb8c-8c8f61c23024.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 0x0f073bc286bac572ecd82fcf66001412ca8b221fa12ba49841553ac32adaa09f. 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/QM6MZ1870962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1b9670442d55d52e2b601649f256ec21c7d1522990d876c137ec20cb15ffb9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ARG991036554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094cdf267e014d95005084b76ec5628902946d7f33afab4c15292733da5b2588. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ARG991036559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146c33d8f0ae35f322d70fc49ac4f71b806ea7e7aba3f857f331c692820fb8cf. 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/QM6MZ1870562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4de7eb8e87364575248ac0e84093f2f5fe535f5d9ce8d314b03c0be17c08f0c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:42:31Z), 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/QM6MZ1870564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fe77a3dba55908de5b2de096b2abc59a3f20ff77c8a16354649072cf966931. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QM6MZ1870566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5dc7e62ef5b01558b8e22946fe07ce5fe14dc336936cfda604f350470eebb5. 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/QM6MZ1870475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb346dd7f292fff42c5d6584b63e5ee4d3217ceb759e4077dd1350ebb49b440cb. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QM6MZ1870476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532b17a970a7037bd98f1b2689a4565da586a5e4e774499560df1b75c7b02406. 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/ARG991036533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386cd6ccf91321e835bf28d6dd20466e7e0862d2cb938cd0dbbb0fa72b38487e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QM6MZ1868905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dde96bf8cad26905a385a07d507ac788293e9a5ee216a13395f32098b12caa. 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/QM3DF2156756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fe9d5509b42465f3aa61beb69e98022b0401b63ddbf447252bd6775a95cae7. 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/ARG991042536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122f7f8fe72942986e9cd0d9fa6db1019bff27860423e96a602523bc2fb5a81a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ARG991042537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ccecb45950a6b3c3b5ac5f50750ebfb794ff7a8ca90987c4ba49823c2da3b8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ARG991042541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dc4c54ae8caf3fe0cb6b713c9cf1a1ff0559c988222dbf6bb50b4f5466391a. 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/ARG991042543.