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 0xabc6b91d61ad3927a09b993fc62e37d873776d43e78aa8cbcd0e67aac4954cba. 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/5643af0e-0bda-46a7-955d-d1b03e4245ef.json and https://artists.proofprofile.net/proofs/artist/5643af0e-0bda-46a7-955d-d1b03e4245ef.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 0x1a30c720393cdb681ff4c597375cc3932b37b7209c190b07711ff27b7b144cba. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAFS2150875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77aefd11d561e3eb4f438967c77b25d149794382ff17c3ad677ff2bd33349b8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAFQ2198016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4223e19e7b63412f7ccd6a302d9a57344fa66489c7358d428b7bea2364d8141. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/FRX872263677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53e50fa1f8970e1bb76a078240229e25822e3c5205595ae8239db69ca5af75b. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DGA052303211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8953bbde4ddcef57664196dfff0cd92b8daaf724e3af9e9d9ffe2404b008f9bd. 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/MXD782002620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27ad48253fc2e2a03d2f554dce6a184f44dc755fd5e28f3f8194fd1b55e1fcf. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAFM2144673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d452523193fbc40f40b26a66d9d032316f4dfddc6f1b7e0d8ccb912ef0e39b. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/FR10S2472228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50538ef0d9a45d3f60c6bf46a7bf23f2b05ef3d70e08717f18be494565dff1ef. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FR10S2472229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa6e85971b04c50d338f1b24ece9dd5538e964ce0a492e6e39109b884feb78d. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/FR10S2472230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4d44005cf732f640c000d7845968d76d40c37761980e4475465ca3b629e318. 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/GX53U2518736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10096a992d8807fd5e1711d2ee759e1b0d466dbe5c9fed1c57afd3803b142615. 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/GX53U2518737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46c4c3a9d0c06cc926872649dc811d063b6b31f9dbf7ad14633093163f10a15. 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/GX53U2518738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5526e2c38b39db082a4ed8623be75472095cb7a025969ecf213b3e80ab6bbca6. 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/GX53U2518739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2cec3ec9da5089390347a5a6dd4092792d5bffb6bfe91a376b4905ec55906f. 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/GBMA22556526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffd7a237d011486391f9d431c917ac8fdf6fa2dba482dc526989e415efd851f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTVM2385331.