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 0xf656784b719ef8a3e4c40264706e430a99e7db9936c5fe7857764faa6ed29125. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/522cd66e-2a1f-477d-a06f-5065a5efbcfe.json and https://artists.proofprofile.net/proofs/artist/522cd66e-2a1f-477d-a06f-5065a5efbcfe.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 0x767bb40f717c42bc434539b2725538663ccc8dda3ab8f08c8cd21e64f5958c3b. 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/RUA1D2341641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5a016ecb68c40e7581974ee6236080fca6c925f131b3baa35d9d1b04875a49. 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/RUA1D2376523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d3ad5a76b3450b525c6a13cb1c27cc0d190b9dfa7feb12d16a6384688fb6e5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:11:21Z), 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/RUA1D2376524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5371e7261b43f301836fb92b2afbc06dd95ae6d4c3d278938bd4683edb63526. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/RUA1D2376526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55350c75fd18c3e3760f789e4b3ebc10cde655179f163f84e69342a33a0d340a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RUA1D2376527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57e986bc42792cf2481eb5ca33698e6d93013bb7fbd11d4f066579a7a9bc9c2. 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/RUA1D2376528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5265722768d52ee04388295016e40511fecafb4c7704dc2d0f804adc15bf0706. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/RUA1D2376529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aca12ab58240eb08722b054b7e1c00fb4fcd770ba90cdade45958f22f7ca83e. 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/RUA1D2376530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921c743224ceef3763a2c93a6673c51efdbfc76767534c17f8f29a22d96f322b. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/RUA1D2376532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d588c824498e2fb6241948d6628c5bed085a0d40dfd4fab1b6fbb96e92975ee. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/RUA1D2480176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3102b672f08cc42d20762619065251df6816b5dde74e1ae5be1acd580b0d7430. 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/RUA1D2480178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd19ef24c0bc909e2512583db78c62a2da8ad6ebdea6a0afcb25f29b5a6759e7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/RUAH62401995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4703cf21220cdf68b8c9f3c6cb7bc21536fa6c78ae1ebf67a53e2070c4b7b51c. 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/RUAH62401996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7c798a51a3188675444898ddab596cdb2b423241c8221c25deedbfef37e5a2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/RUA1D2552556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea86c0e06c3c30ca3ea1f7512301cc02589513d82a343c49a96a9daae4012730. 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/RUB422303538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e12d77a990cb92699498a7b57d63f2c7097e0bd7fdd0017147bccc0b755caee. 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/RUAH62423526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece386a1d16624c18aed1236502dbc0ac69c07d6586dff0d2d4889a13e698fe0. 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/RUAGV2405885.