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 0x32fa3954c3fc5787d9e6ab05c18145bb3b0875e0222cdbfb08df499466836617. 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/9fc0e192-cc70-4a22-980b-05a62f9afb97.json and https://artists.proofprofile.net/proofs/artist/9fc0e192-cc70-4a22-980b-05a62f9afb97.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 0xb8f3adda0ae275eaeb669cbcaf40aa79d5b70bfb29507282ffffd399e06d384b. 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/FRX452420430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8622bba0efddda5f974a2a74a9cffe5a558e6b8c5a8ee598450d8c2a208150. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DGA052493060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad1776b3bbc2c51b2d88436cd41b6f94069489ea6bcf998d24a8a41d0de2553. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA082416967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5db60fc690bd8e01fc62ee4af641abc6cadac11cf35c7c17dbf598d5e25dfaa. 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/DGA0R2403624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe069579d8999fb36024f4e6508a51ffb234db6a6aae1d8ffb8ed353b5dda7ed2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA0R2403625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39f55d1722ca6dd7eccf28bc9eea081219e771628751be3c34060c40137c529. 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/DGA0R2403626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717b50546cfab9aaf16bfb2f9c58064091caf2934b22ecd5c68f138db15a741d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA0R2403627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c6ae730d73877e1d488ee92663eccd5b1d2b586e0a4e670c025245a48e7749. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA0R2403628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884c85f97fead0f26e274e9b67a894eccf1481ae7de1317b667141db98df96f1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0R2403629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dbe57f8a10c6f82c5c7c4157c2b93b712c877c8158d6242c917962955f24d0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0R2403630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c3bab0d0719c66f2f08d4db31dfe76b5a61995a9a335630f3b901cac60caf0. 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/DGA0R2403631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172c305221af0dea69ed6bbd7acb26ad35cd4ce792d0a3ecb11856193418875b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA0R2403632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43cc5dedfec1158782b2e075358dd401390d99731efedb10a3cd7345a0ca55b. 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/DGA0R2403633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b2f90d172cb7b569989d5aceeae424f333dcb1feffdab8d21cb7be78a1e9ca. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA0R2403634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7c842468ea1c51b9a67d76b41c60be4d1aa0bdec5ceabbc86987cffd7c2764. 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/DGA0R2403635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11394e21c2ff82496355c7fcf21ff6aab0783b7057fc3646c62c448716e898fd. 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/DGA0R2403636.