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 0x259d1feaafbbb47db17fddd3df0f53a6ff845906fd57c42751e112dbdabd65c7. 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/86797b1b-a218-410b-8157-7dace7bc43fd.json and https://artists.proofprofile.net/proofs/artist/86797b1b-a218-410b-8157-7dace7bc43fd.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 0xfb68c35cf007952b6b8cd9f1127dd90a6bb852f3d3ecbcf9dbcac8fe469a382d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEZC62003407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ec37e678c805819b12f4674ced3b3e61b4dbe536fab54ed5c603cca2b3bfde. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEZC62034038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d434e2f5850996baa34080c01e0a2d3b23eea3ebbef39b7269b7140b84fd808. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEZC62048900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f456e3e6de2de10d99e514bd5d6baf1f728e74bcd60b47f9b172ef006eacab. 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/DEZC62100327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b6c8b972b04d15db3522b4deffb9f85c5ce2379acf4cf1a9410dbc641d09a2. 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/DEZC62100328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f4fa682f3335a8d0212a6d21bc4f4cb54ffe28f2e446145d068c9a8e3e0f18. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEZC62100329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290ecec648c3c897371fd53ff61337920f1379dd67919dfe107ec501a5cf76fe. 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/DEZC62100330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856e7d7a85efeed7310f46ebfbac0ba614baf006d986844cb7af119b4ebcc0aa. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEZC62100331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9629d2a64095c01aed943d74537d10662c59bfd96f5710354b20a94ff5ff93. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEZC62100332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c7efa38493837da530a070520ffe4d649f44303f656e38dd3772677d192898. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEZC62146491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0df3210a4208ab7f5e34fb45c79f3835b32659cd6c581b9e3d8752835e72c3f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEZC62292695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cdf5b6093f44d9fa0145827965150c8176ce9982f165e4be92143ec57fd934. 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/DEZC62292697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278a8d1d8aec2f550bc9f2781d9a74eba60ca3d544d25222e1b81150bc105f16. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEZC62292698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f73451644ec70eadb702b0a982e5d9d2a125bbce9f47a23a725ef1f0403c3c3. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/DEZC62292699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfb3414723c5a43e194fa7f7bd71021a7ac0d20d0d423b417c806991092b8ce. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEZC62292700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315b88c703a9e0ba2c77cde04b86f6ddc65843dd00ebb6d762b8135ab6b5f238. 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/DEZC62292701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeafb776dcd31f47fb8daff7467e028056ad9117ea2501df03e96b268c5b7301. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEYT32000096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeafb776dcd31f47fb8daff7467e028056ad9117ea2501df03e96b268c5b7301. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/DEYT32000096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481083993fefd7124569a4f880dfccae8d2a97ba4197914fad95e0ad8539651d. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/CH7812239825.