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 0xdb2f830ab34b2a5c07fd52bf9cd86d102dbaa293a3a920d6c957d66b7d429813. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72c91dc8-fcf1-466e-b1c3-9e38f814fa2f.json and https://artists.proofprofile.net/proofs/artist/72c91dc8-fcf1-466e-b1c3-9e38f814fa2f.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 0x75fb52b83e89090ad9c8c3e580295adeecbe740464de3fcedefdcbbf12d30bf9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG1611626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8e28cf177f666d1b9e710d47f0d3e7ee4819ab370e9469415ea68b545cba48. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BROCF0700230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7331caacd8400db4f42ea5f97dafc95517352501698be51126a0c910af76ca7b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BROCF0200097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e1c62b14bdeabd6b6f5013c427b429fc93a23f6ba00fcc30993e0d76062590. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BROCF0100219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127199320a8d0cac778f043b2a8c5dfd487d5527fa113109b6f0095cd8c9e470. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BROCF0200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae4506330d7a22853560374e8d7e8107f3bd805bd3210a017e9a377cb72cf30. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRUSA0402114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a0321d3ca8a030243b1e7ed36d22ddca49b2a6c4d1e0dc161a0792e9231c48. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BRUSA0501134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e74351a7b5e3d20fe36e5f4bfc6ba3b253bbed4a37b4c05c311e870cd4b794. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRUSA0402123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a88fd0dbefad8105ba579f7f151ea954fdbb851697f265dc503ff11e3ab6f3d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRUSA0402125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab96f8bc070979a381998621b8d89ed6da9dd1241331b6833058ebaaf1e793b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRUSA0401896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae4506330d7a22853560374e8d7e8107f3bd805bd3210a017e9a377cb72cf30. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRUSA0402114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68956bd80a02d838dd817c6ec67b8e954922369be6ab5d703bb59f9590b9ce9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRUSA0500811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1e47fd5f20cbb839c98fd4c1f91641aa2e7e01bb31eff18ef502a9fc725e54. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRUSA0500513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd961d7839a91791db540566f2bd52530c34e0a11ee0569e12048fd89ec051873. 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/BRUSA0300627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabf51d042d4bd12d0dea5861066b3966f16b526b0cd5df08550cd58d04b6282. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRUSA0402023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619179aa0eef8777b404a5670af6853ee0dbd9d1beceb8c90e2630dee7f09ba2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRUSA0500872.