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 0xd96e1ca15e50766b980b1f5ac4551f6177a1d99550cac5d10d7e9633de0e7ac8. Chain 2 (Bitcoin): anchored in block 954032 (2026-06-17T01:59:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ba73cb9-3a6b-4c0d-a30c-55fbd908d990.json and https://artists.proofprofile.net/proofs/artist/3ba73cb9-3a6b-4c0d-a30c-55fbd908d990.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 0xc5ff8ede7ad1c06a99ea7d36f432d0a966e7334776f7cabd043d1cb3ef80c699. 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/HKE022234739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4dbce54d6ccf6b3fcf5869a936be1bb73e22c6245459884ca98bb169dd26d5c. 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/HKE022234740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa494b52f4bf38e7272141d3bb704cd637f862492285e4b9d77a9b96bf0dc4aa4. 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/HKE022234742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c3207f3c27b77e8966242a5318390dbee2e643e0b0541c96a10e0dd79afb49. 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/HKE022234744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb6a9b72525d4423b7b24fc124bbc784b6cfeb7c8cb3ce4c307daa855c7a717. 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/HKE022234745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6076abc98444106de6924a9302f79c4a8df03212cc9f4a2b89742a9d4a71ab. 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/HKE022234747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f4c4ed47999c2b681ecf71aeb8307ea463abe6168b0aa45ed15f29211cc146. 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/HKE022234748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b21e2d1e5d278b0bf1eb12a8bf0e0c6927b916fe54c49f05fd609f475625bcf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWDL71904330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7bf107cb5ce5df03bfc9952e8874fb94bd89e567917007b1065f59c0633164. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWDL71904331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1739a41cd7c97ceb0e6bbaddd5fb08d41092fd8c2c27e3c5c436e2376806f30. 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/TWDL71704291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbf389f352a1338ddaadb4652a0eaff37dcd4064b56b57422e84fa1acc38b18. 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/TWDL71904333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabae328eed810a054acd205b78b26b14cf76662896514bc73d1f529a74a5cbe6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWDL71904335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb57b50624cccddb3bbf34472bc92c882ec5548f46a2d258c9dcfc4021e6bb9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWDL71904336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c17d91c7c8ff4a07c0ebcf7c8d964a7ab3151dc25dd9fa0e627ad41899fd234. 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/TWDL71904337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce08011e06dd89ca81c3a8d0f05e400da8836590a98a9338c877b9a460151a3. 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/TWDL71904338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf23af243d01cfbc86ae9c55ec947d692eca3c0f7df365dd2045e612eec2090. 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/TWDL71703915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0434e5c1385742e6062dfc0cc7c962e42006672eb54d0a02cd8c1f4bb050d9e4. 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/TWDL71703816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afc74fc3f3927229e5a7b3bf0f812cfecea70f413de2989703e1b45ff3e8269. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWDL71703918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebc44255bcf9eec616d803332e5190707be35f215c52f967f1fa8a3df55e597. 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/CNZ852200608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbdabcc9edd04b6b4a7ed93fcb80f842d0db882e2986ba830269d269eabcff1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CNZ852200606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18276164651a8dc12a04743eb67b2e30f2aab5d68aeb2b2a9a9fef256b2faa9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CNZ852200612.