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 0x4e3f4bf9c8e92a54c72c51ed08460eda47e1a612626ab13ce24959328a031eb3. 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/215eb2d7-606e-471e-823c-4d9a69c2a1be.json and https://artists.proofprofile.net/proofs/artist/215eb2d7-606e-471e-823c-4d9a69c2a1be.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 0xeb9b840f9a10b22bb400eb624f8debc294bd90b974d60686d214520872db8273. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DECE72500086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488d75273073ce6bf6ff6e919a9c49b5b70ff6cfe574e827b3df78f1c1bdc369. 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/DEL942400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245438fc6ec1862ef03e1357181624589782b048f6f88b4558c07fbdf9663e00. 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/DEL942400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec71068c90e1fc868bad28619825220ad390433ef247be5136a18106d3228289. 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/DEL942400036.
Stabile Mische - Daniel Hahn Extended Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3519414bff29a4d8c5b68a7b991471e44fecb3b54e6619bb368cfc52b8cd68. 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/DEL942400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeea059b6395be108ee6c87098561bebceb291aaad7172f9824948873732ca58. 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/DEL942400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4a72a9a164559dd79a9ef551d143df6228766242395caa93e06078bd843f16. 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/DEL942300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784784034ddd7c43ec7509f557fe7d58b8dcbd65c27de16efc521f0a658d1bc8. 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/DEL942300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9734a92a1214e0503b10f0621cb4ea4613e244d9acd784d861cfae8d3a4d8fc7. 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/DEL942200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865f50fc4eeeefdc5f72a6cccd7162e2edfb9615cc0b98885090fde856790872. 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/DEL942102020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef56b88672377541a23a5b3391db15a39bb151c0e7be7c80fbc35479c7689b92. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEL942100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1a7cc13f917d54b0f527508e72e33ce2eccc3dfed00c0e8a060f98023ebe46. 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/DEL942000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c71970f7834bdcee24281003f81b5f3209b47af5313e7b2f8b3f17480d352f. 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/TCAEX2028565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fa6fb3b60a2a58c7675e802eb6402787ee7ee96218fb330564388ab77cd4c4. 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/TCAEJ1976330.