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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb4c15b90e7a73bcf68bb3783b855782a3af6041f57c02bfecc102f002b1ea3. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfc153d7-3b5a-4dad-bc4a-d2cf57bf814f.json and https://artists.proofprofile.net/proofs/artist/cfc153d7-3b5a-4dad-bc4a-d2cf57bf814f.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeac5f9149b777e06bb98fe65eb65e5e09357c40cb7fe6bdbe2e0a4b2f159ecb. 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/GBAHS2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387f60f561cc7a7ca5f5edbd69315d0fe97e33b468e96587a932e59963cd321d. 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/QZWH32500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371cd404837af96d6431b13de6d67eff54436d20fc3668d81ae65ab203085125. 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/GBUM92300169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9582c6dc30d1a7be277a8e7413d3a9b036403290ec3b7927501f58df0045f3a. 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/USQY51530657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ae3bc96084aa5ed91166024893f13a79c399bc8862611a807fd7d5e628afea. 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/QZWH32500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9cf2c56db7498eb042fc09b9840ddf580c5a06b0392b09478df3dcdd58efe2. 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/QZWH32500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a5c46829c857b074939707446a7ce242bf7ee5e0293e210f9c38749a806441. 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/QZWH32500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e611c99ee17499aa0f6e3895f21fc7af034bb75b34a324226a9b2e558c20aa. 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/QZWH32500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7141a765f969e88bb24fedfdb28bae24a8e239d814fc443df4f0a1b8538f16f. 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/QZWH32500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2d5a54d81c6d35e30ea737287eb253bbf503224e4b51618eea9258a1a51c37. 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/QZWH32500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ec99a94ed2d7d3b77a6c36a9e836c99545615cc06146a3e59df0cbda83932c. 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/QZWH32500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059a69fb40ce22809c0731b9edd66629e5dee3d055f2c104818b12b21d591593. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWH32500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd3969b785ff26bd129b46bd4faf8fbde413d5e53d7dec08c90b8c161d761eb. 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/QZWH32500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe593388098152ee4e541a035426436fca3a26fbc71a2d4ba2e9d8d54aa654791. 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/QZWH32500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387f60f561cc7a7ca5f5edbd69315d0fe97e33b468e96587a932e59963cd321d. 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/QZWH32500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff19f44cc39d746deb612b62c0d2a582005e2323d21259b7c46af36747f4e61. 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/QZWH32500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de5e1484e851fd8dad32b58dbebdb0c220c55cb17f8d85cd0f8263eb40f1a1b. 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/QZWH32500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a19d66dda45dd6ef533a3e2b98f4fbfd24479423b68be17c9db038657fe5899. 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/GBUM92300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e983f9751f37c8d9f8a81c21b62e6bba94f8e7f22d48fe5bc44530b59bce8f. 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/GBUM92300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1ffcf5c719e8d00de9045fc147e4b559622fa14f5cb3a5898fb37fe9ff3e4c. 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/GBUM91900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc390e3a1bda91667c37e911dcc1d8e9b7d722fc5d09252ebe13da8f14a705945. 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/GBUM92100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee420cd46da2091fdd1f432253ab18effa5937119b84f7e463702fa015817110. 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/GBUM92400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37eb2b48861c21646f10c6bd5f9e5a2f8c4e0b1501bf175fdcde409628bdaa12. 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/GBUM91700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e593f805d779f9bd8eaf59e4b8ce17fcc07672694d749d806a5476deb86897d. 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/GBUM92000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991c92c5d9e4cd392aee74b4275c923f5713e84888ed7b557da3db1efb51021d. 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/GBUM92400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecd1019e6fc0cd44e85daa5a18d4034f18bdf9718ab329a7632c354077f2ca1. 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/GBUM92400010.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb48962ef91065dfe79b2d441f256bcfa9075d4b2ff0ab6fbcabde1c5768a9b5. 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/CA5KR0033287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba4264377cde726915cdb91f10250dad91c8c7d25372d23f1e8efeb27dcd605. 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/CA5KR0033303.