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 0x3bbc7f58adc7095b4b5636fc1dd21b1180b45f23019e0e2af25f0b9c546f2d71. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c807ac0-50d8-4a83-950d-fdd97c9fa7ac.json and https://artists.proofprofile.net/proofs/artist/8c807ac0-50d8-4a83-950d-fdd97c9fa7ac.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 0x3d2b779d61c4b2c938d138036b61aa5e4ba3eb85b335376fb912301cb9001bf1. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZTAT2212798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa51c49afbb10c8f285fcfe931ee039e0101c19ccfa899e242581ba3b2e2e9de. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZTAT2212799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de2b70a28910bb76dc0c47bc6b4b7c51e5e1cf10672ee16b944a3ff14d74fa8. 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/QZTAT2212801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb5a67ae63ca2a5c7e806ba75fccdc4279901a2c476bc104d0409b9aebe8713. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:25:28Z), 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/QZTAT2274119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762b4255bc914331b67f769ca7a296f06e6a50a2b23eeedd3a515cf900ba7642. 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/QZTAT2274122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4baf6835f1a3b81599a4129b21aa0ec8dfa9b7dc758ecec13f3b1a959c8a47. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTBA2250483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03867e3aac66e1b2042078e89058fd5c99190e79c30f56ebb7b2943cba5eb462. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTBA2250484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97f4d71d5e78e5661f741eecb266c8b86e70ac78d16d55a0f46463a6e81125a. 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/QZTBA2250486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e38d33ea7ce1cac67ef406d195c3d18a3cef16d64b53814d03c79e220c8ecf. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZES62340851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf037bbd12ce541f62eb024e9c8e4e9821bd48d559ab2266283d50e7e9398a102. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZES62340852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60a23a126b945d62dcd1fcef57c4755a5bcff36271eebf661a1f6cae291562c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:43:21Z), 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/QZES62340853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb9ed7e103c2d8bc18568a736682aec96e5297520d07627047c823d6f1f67c3. 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/QZK6Q2332165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d85803a980b7824a075f7d7ef4d753814b0da19a6ffbf53a725be71d66a180. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZK6Q2332166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bf20205f449d2d44595c2a36f99984da5d338bbf50c1c6e668d0f43477b0d7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6Q2332167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb84d22bddf8657e58030016347c61792e64654cd4135f0a07e4d2cab0755459. 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/QZK6Q2332168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb40eaf118880e8319c0e25aacbcb44b035b51b5380239d199c9d340f6511110. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:23:34Z), 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/QZNWY2305845.