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 0x5026b33cfc975935bf579d890deb74bd07ed9e833f2ce875d21d2a54681ec02f. 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/2f0f382c-0c56-467b-a150-26e279a8f7b2.json and https://artists.proofprofile.net/proofs/artist/2f0f382c-0c56-467b-a150-26e279a8f7b2.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 0xc8845f2e7bf538cb93f38f3bea33b8899089f16abc8ddc597c6429bb598c18f4. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/USA4N1306069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49890b3598f45d61252cb3220bd36d0a84e8672b33b5d6fbbabf15ab8007e2c6. 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/USA4N1306064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce0ad7ad3ef6c2ea092796b424d15f3d8ccd236add91967937f31df448b2925. 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/USA4N1306065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32faa06777f0e145cc32df88e3b7daf86dc76ec1cd6f4b66359f820c96c00736. 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/USA4N1306071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45b57125195dfa66e305075055001b35683f42bc831bdfba0dced471b06c0f3. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USA4N1306063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f8d68cefc9b0bb870115ded1b87f164473277e2738e440165a4b94caa67fba. 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/USA4N1306066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55405290d077250ca278dd1b7a6130717c539bbeb7fbd78bfcb6bb7b78bda142. 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/USA4N1306067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27043332af29a9fbe6aa86a36f59d1ed4704a74922d3cc158112b65030ba633. 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/USA4N1306068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c253574e00e2ea10d998bf1fa5fd9f6e7c940fe5de7b2dcf3092df1693ff4a. 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/USA4N1306070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66079aefb0317842fe3be978fee2f93613468431a47dcbc761f6303ff50181d2. 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/USA4N1303620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d91b2c50b317c8886bfd6b3932bec36498d9e4856ed98317966795618f5d67f. 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/USA4N1400338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa414b9b2e191cc5a0a3dcd442fa0928a5152db55a6775f0586e678d5eac95801. 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/USA4N1303900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb243e7ec54eebde985a6b71373d3721f65125164075616800a297943a9109c61. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USA4N1301798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a677023e7fc4885f4cf92665c161e609683c7449f703825f27dd4056284ef2. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USA4N1301821.
Today's Music for Today's Church 2020 Supplement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d61a522c2327b3e89efb621768420cae0e55b59e26b5cb635e324f007ac0b5d. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USA4N1500580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d25ad50b69d36a9b06ad3c8544135e8e4a1b4f88be34091f8c158c58be898fe. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USA4N1400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1bc4ada9892bdfd717cb9c5442ed3c75ef814a96c627e6445691fe24169a55. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USA4N1303764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b3a530d4580bb31f0850a522bbcf8bf2f8c8c5a3779203331153d575320607. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USA4N1303736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e9ad69f8532f376f9f775e7dc744d6748805608f726a3996690318105c34e4. 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/USA4N1303616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb847b47d4f96a9c28348cbbca93a6a02c8d02595d9ae360d948114891de43ef5. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/USA4N1303769.