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 0xf3a170404520cfadd504c662492d1d3ed307a8cfb29a045f91e1d7e737585dd3. 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/b8aee698-3768-4055-91d2-f4aef49e7343.json and https://artists.proofprofile.net/proofs/artist/b8aee698-3768-4055-91d2-f4aef49e7343.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 0xb02cdcc157c965376e752e2f8c18b8e24941adcb2dcdfa05f3a3b740c959770f. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:39:04Z), 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/USSUB0256605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a17dbf991a16f2baf362e4ed00092c6fcaed66916a218076ba7b6bcc7cc1c6a. 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/USSUB0256606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf4ec226c074fa2388472267f3e832a2218b9133d5e155bdd45872a980a64a5. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USSUB0256609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801844975baa658a27bee4372a0f58ba46e8c7eb986c8703f61f708a50613f52. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:27:11Z), 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/USSUB0311908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9211889f4e803d54501e1a91e03c26001ee0821ccf433110dab33685b19a1785. 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/USSUB0311913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d942beae6c437f2d69829346d48897d7666038d1e56f44eed901fb58be3bda. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USSUB0311914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b12b3713b975e1b28c1c6f763a9a7d14668a7d8de6666b87ebda5d0845ec65d. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/USSUB0567599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a9820e81fefe9524210f52f6e2604af18c6a284c854657d543ddae7235b5a1. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:37:25Z), 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/USSUB0567505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9114dc6b6f4c89564787d45e358b3a9075a5e1bf8e582dcf0d2de231c82f6ab7. 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/USSUB0567506.
These Friends Of Mine (Expanded Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb5712b78b1a153df0f05fdf83fcc85fe50340fe93592b9b973524a09c7c916. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/CAN110602050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2796d0ce4465a3ce2068aa4557f5c87a8c071a08750986b198ea4e81e40edce7. 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/CAN110602053.
All the Way from Michigan Not Mars [Audio Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ce8bd98d35bf480b398d62a30011f854cb95c702dfd28b8f9cf4ae522e7be5. 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/TCABI1224461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea32cbc266b8bed5fe4084b9774c51103dff0211bd09eaa0d78eead161595332. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/TCABI1224516.
A Very Rosie Christmas! (Expanded Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442f81b85c8e4b0c81829812c9e3f455bf98e2ffee0b9cea686b94f9d363442b. 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/TCAFY2118023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e494caacf9baf4e5048f671ab13c16e8bc93608515f02c7a2299bb950a04ffe. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/TCAGC2244303.
Come, O Spirit! Anthology of Hymns and Spiritual Songs, Vol. I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4834612c24f301cec78916a991ffa9950829d6e0a655fd7a5c755b173a3204d1. 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/TCAFX2131190.