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 0x54619070ca3dc262bcc5dea9431d4031cf2f16e71f60f918ca54da1845c25f89. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37996a15-747f-428a-9408-8c2aac16a95a.json and https://artists.proofprofile.net/proofs/artist/37996a15-747f-428a-9408-8c2aac16a95a.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 0x3065ec27f76898fec973b796c98e915afab218eab72e472631c9c7ea7fc8bd78. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P1507241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd5d0c964c8a7a756d1d53939a1faffe880efe394895c26c0b1c5372f283d0c. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:23:20Z), 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/USA2P1507245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca85e857746f6b92e073546b8a630550e83786e48ebfa26d18f9593b36cfafb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P1507246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06de236c08627acce0afc174106a816b3a98b8561a20d201ebe51d08fe96cbb5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USA2P1507247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078a2410706a612882088dc76c0b07e18fdc9a0a0b77ad978eade6909018f36c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:35:53Z), 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/USA2P1507248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bc60292701dacb8c3e0a5b9be16a4b6b0e503c4ba91af6586fec38272550c7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USA2P1502835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248b62f69dbb70c53a6208610a5b42f4f82afbafcc72e15d2e184a08e899a869. 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/USA2P1619757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bed56922db0f59007a294894e5a7fd295a2959f34755daa4da48ea8a51e8604. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZFZ62059100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa838f6d3b595ee612938972a5c2abeb67219ee6c54252e3809283fbc9ac5729. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:03:02Z), 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/QZES82237740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885f34d9786f233b4a4b0bcb80e62bb735fa440d609d4703c3b671aa3d99ee23. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZES82281929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1364cf6cce96f82bd7b92428f765a21d9cc255cf9283a641a9807f0685a93a7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES82281933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ade7cf171d0f7f50f37f712b4544e6216ef9dec5457bec61bf0f09edc8e68e. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZES82281934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff0bd10f96ecf43707e450aab4756329d383793d7ae034b081645b84f9745e4. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZZ8A2357832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035fdd31b5e5fdd148137b8fe8d96b73440350debcd177e8a6e18f5544a88864. 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/QZMEN2104487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536699960ef0152875ec09705519ca1387b0095830185caa1147bb9760a8f5b3. 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/QZMEN2104488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548f49dfc7fe989d52a26eecee629ffe66b03f326f38962b2c590b98e77bea58. 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/QZMEN2104489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e24d9f0e7171671a4d8465e178543b053d9dbcc33f5b92c7dbc2dca3a2825b. 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/QZMEN2104490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0deccd5b39790260dd41e872f749cad312dda1710f253ee0110905c960c4c73b. 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/QZMEN2104491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3583a7a79bcf80267b68b70aed2d3537d3aff7d7bbdc661768b9638dc79a61d0. 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/QZMEN2104492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a40c64646de2accc0ad88ccfb304e94686d639bff4d6daa6efa6517666e6e9. 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/QZMEN2104493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fc1b575291c6fe0637e343727941b706f280e187aff7f08d5b8353d6ae9d86. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMEN2104494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7332755e48c9f6b3814a1102d48f2e04189f9ac1a584bceb8c5498088eb9582c. 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/QZMEN2104495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03d8d1fe2c48e14f7b2ca9364b48cfa132adae167739b73a245666a6fc541bf. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USQY51795704.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch