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 0xa3f4a0fe8d7e8d8626618984feb26859e99dc6be5b9af2d2121fbe73e908a806. 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/1d2a9ad8-fdf5-4a0b-972b-962c50448db9.json and https://artists.proofprofile.net/proofs/artist/1d2a9ad8-fdf5-4a0b-972b-962c50448db9.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 0x0501e9b96fb8fac6426234b8a99a7d0dd1c6929cfbca7a5f36335409ff471e7d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZXLZ2523045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b71d919617224ec589d6fdf94fd3a79b12e9f3eb44217d976a4d7bae6c30415. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZXLZ2523051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5aceb870fa443eb74ee86679b53cddd49c68d08c301ca0a63b3ba5c839819c7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZXLZ2523053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6df485f02efe1869364f0a2ab5d40398240d7fdc123149e62ce07f52d8799f1. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:06:12Z), 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/QZXLZ2523060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93647b228a988d67dc829cc70881494af50c443f74337cb4ec8d960f56dc9af. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM6DC1724076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd322a6961d1c50796e354264d5c6910452d9f15e5df087033905fb7362c19c3. 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/QM6DC1724077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf9bc63ff92b4c0f6985daac1ef805168f210769302376b5e519d3709d9239d. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:19:45Z), 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/QM6DC1724082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a02b1997a15f1d96b71a47091bc18d8824e6e59ae4bac40f16107bdf11c4a0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CA5KR1559977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e27a1b138e6591efa3c931c8e20829d17cbc7ae1e8ca1329b12b96468d03ec. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:45:25Z), 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/CA5KR1559987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0133c68c37427addece26aad48fffa7a10eb6b10d763a1d78bf9648c41b8bd. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CA5KR1559969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38f721907c75d82106c812404b6d285eada418f2a80f58cd35777ec56aba658. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CA5KR1559973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cc6c7a377ad4ab39969b72ba3de67667936c314480e193f2edd5312f1e72d9. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T16:00:11Z), 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/CA5KR1559974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ebd6a125b99b2f33b2f008d8641354abfc8ee94ff9666f7276d06a97fce82b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CA5KR1559976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22839a955587d3e2cc1f38ffe00ebcd4f0390310b29913404f5ff4a84e20abf. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CA5KR1559979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ac4112595a1e056dbd06763b65f79131cf9fc765284dc878908722fa259421. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:28:19Z), 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/CA5KR1559983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de12b34f65dfdb732b59514b8d1899838ddb2d61571604cc119060fdff3908e. 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/CA5KR1559991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0420b7c38466b6ca014ec0bebd7eb20b0d8dbfe502a2e5706ef3afca10c56c9a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CA5KR1563542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0409f8f6c399eec640771ab640df54303d57089922146d4b1beb017c17efbbc9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/CA5KR1563545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab6758230a9af40819249fd627aa7de21aa8a3e92a0604f94dc990eaee020eb. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/CA5KR1563546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78b49bd536252f504297452540952778b4717ca1f2dd956f0257014cc85d740. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CA5KR1563547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69250f3e6806f44a41ad94dd115d0514da9bf2b5e6054f471c3fb25e9299693e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CA5KR1563552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3b6e813d42322fe77825f7dbdb2b2bd485ca89af945bac98fb15ed00e22019. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CA5KR1563554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fad96a02ecb876b568021a9c8099aaee5e5693127fcdd8a68dc3f99f999221a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CA5KR1563555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8367ffa9f73907acc908b11da944aca3dbb9ac9f3d2a3b5fbc1dc41617aecd25. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CA5KR2009761.