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 0x5a8225a2e6dfd8a69ad6dfaee744e35aeab601f73675031aa33e2118c8a1a6f5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be1cfec1-f317-481b-af1e-89e0e671b7db.json and https://artists.proofprofile.net/proofs/artist/be1cfec1-f317-481b-af1e-89e0e671b7db.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 0x806c657b8d611056052de1c85a55ad3d399512f4a78f9df52f6c98b670a88de8. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/IT8TZ1926503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9b35f1d1f6f79a8096bf56c8101c5a29da7a17f42254bbfb0539f8449c1d3c. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/IT8TZ1926504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce7d726c1e83a4cbd29922383e28b50caffd6502df23b6647e8d3fc8dfedf46. 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/ITZ0X2090162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2885cfc0dfa83ec8bfc21de021a3adaa901c0c78d4bbf18fff09c44f40faafb4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ITH472006402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8104fee76fb31b84a0bf15b53cf9a5fb8269a2fafc02d6305a066b350dfe3d3b. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:02:57Z), 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/ITH472006404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcc6a8a84487eb4bd20930e73f0ed66c44e5bf427c79abbca366878ad3fa0fd. 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/ITH472006405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fa6b5212b80a09ebfe56873c4eeadabc6f9bb537b9f027238c1fb6c7e31e88. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/ITH472104301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b42f0e9e0e8ef3d6fc19eda4976c1d9739a26502387861cbe4be90c061b2ab. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ITH472104302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefa2c6746c3aa9fe9d451097f7c19f82e5500dfc06de50353cbfa66069db2b6. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ITR632400230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09c4d3983a03dbca8fef4c6c845dc548c4a8cf4e43db44c569a80dca7f4b5dd. 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/ITR632401189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9f957e8aba880e41a3d78f643e30ee5383e0fa20ba82d7480e77ed5520d9b4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ITR632501325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578c603945914d813f004422f82e7357d8a2ddbbef4b3bf340065dca80175526. 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/ITR632501326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fe3a0a70903fe43c229270e2cb3779c6360b2feee843430e0a4f64a0eaf394. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/ITR632501328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cb996ab73c144824a497446b7dec36455e25b0377a260ce04fe7a53088f1c3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ITR632501329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe705d073f105bc23e350af54799ac35d1f2a76863a8e195aab9d414d26d9c271. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITR632501330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb72a59e99cb7f7adcf23bf1cde06aefc8eac0d21c1856bec19927969c48a04. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ITR632501332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a25f0c18fc94ea6c0bbb72cc4b9f31aa02473ad6f8817d92c2060de9de7f766. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ITR632501333.