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 0x0fddc7241805a621c2c2e5cf6f81cdd05ae51c0ae9b168c2093cb4751ccae97b. 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/d8df392f-8fd5-4c77-b260-e0ded923c612.json and https://artists.proofprofile.net/proofs/artist/d8df392f-8fd5-4c77-b260-e0ded923c612.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 0xee0ee2b85c23aa2a42d26306198657caeb44d6d0ecad3bcd4e61bc8d46b5164c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6XS2201300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54ef7d94d169e2b41062d45e7f5955ce3b9bd91ddffa15005782aebe8af2f1d. 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/QM6XS2201390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a89276264b608e93b10f985aeda8b1998a1b328e345eb221a817ccb1ab3c2af. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM6XS2201391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786498943ddc0d718eeb4e07cbfe156a08803107c18b0561fd7018d89f46e8bb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6XS2201392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebce24d0cec3723d3a78b0265ab751810219c16adc2518b28e9723f967d0668. 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/QM6XS2201393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5ee4ffd7a70f7fed2f4cb37dacf8a2c264d0424abb07568abda7978371423b. 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/QM6XS2201394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0ee2b85c23aa2a42d26306198657caeb44d6d0ecad3bcd4e61bc8d46b5164c. 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/QM6XS2201300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7610e4ec80153cbeb5ee20c8964f4062986e6aba40359b7f0f74b4f23391b2a. 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/QM6XS2201395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1028527a6788b55be03e741f70f9568a0d32c2d325ccdd00eac81f88f45392. 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/QM6XS2201396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7df3fb6033308d57386753be3cf69f6de104c155f8d3b98074fcbec50b5222. 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/QM6XS2201398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bb49332e1406a6fc85ff9ad8e68b898e0139efaa9760b2997c3f62df9e5cf3. 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/QZPLS2302898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d904a988ac9eb53085bd5869b464e24e88e014c7867506a094fd32d85493ba. 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/QZPLS2302899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d551bf823daa1e17b26d7d1be806dee8a1a8f13350df32a3b877242f4acd489. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPLS2302901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbaecfebfc48c7309085a8f4a03a34783cf08b184af7d63c4d902be4327f6dd. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZPLS2302905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411ddefd0b9f9f43316658a195c3bb43d4065e4895ab1845e75c94665ea1f85c. 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/QZPLS2302906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fc20bf16a39ad04135bb9b1061fe9d1300bc31563bbe0c5e84894a176fa0cd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ762553600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0074317b8f55de866a23eabe4213d9b2f31a5f0ee208489f744a230c4f4f78e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T09:04:37Z), 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/QZZ762553602.