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 0x854e0348497491a4f3022d0545a4b9e2f25f1e352e5f8ade3ff950bc162b8f89. Chain 2 (Bitcoin): anchored in block 954031 (2026-06-17T01:43:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a199369-84a3-443d-9594-265c605e2f29.json and https://artists.proofprofile.net/proofs/artist/3a199369-84a3-443d-9594-265c605e2f29.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 0xa22e540272df7c46957ffa031c3664cc474b7a44ce8a11882d17c6cc1e1f3096. 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/USDY41866541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c575ed7e8dd29d7d7b2c28eb279ed4072e77485b0dd04172c18da9371c6f7c5. 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/USBST1631006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded87858e890741c5ddbed472139b37d932889268c43010fb6b7edc4db8e384f. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/QMTFT1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3014ef6a21230f721099e378e27ac7fb885d4bf5e86b20dd8615922c1dce3b1c. 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/QMTFT1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1e2248dd4fba4e34e51a7c1fb6aefae677acd8efd397ca97af144bb0f22037. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QMTFT1800001.
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 0x5973e3c898150a5a09a259d7cf20d926f724678413456bc106f2f9c3b144fdd3. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMTFT1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f2eb79e2b91c8e2e3656b8ec522802c5bf5298fa02d53d84d75a8f1c28b8bf. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QMTFT1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73205c5d035d7245c3c661b385c04677e2977292020340e46e99f30bd95fdda7. 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/QMTFT1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf48064a87fe9d017cad18e0f97bcda368207eb02ff3ae68f3d24d70fc98069. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QMTFT1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba7824b4141dd822f226f0c97bae27bd54341fcfa389e38c7060944a03b0e3a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMTFT1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dfc48d5d676a164ed3125a440f9d25979467fe2069aa2e869fa1398705f476. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QMTFT1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa125798fad1b568aad3fa6cde70ae834da0d3f59fcc9aeb7df6272d27f858b3f. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QMTFT1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca5b999b37b3aa712ee0a8e1f6ab68592baef157c0aa6b420699ff29dc385db. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QMTFT1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418e9da25b5d94c61c35c6d6cc7e2002610894fdb1f5429424a7358689e78ecd. 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/QMTFT1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe188b3dc616d5a578fc2574e706e8836fa15ad7217d3a5c747fef25be0f58622. 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/QMTFT1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138141c1fc6363bf2dadaf78a1bb9252d692ff0f1c36bd3a60b58bf9a307c04f. 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/QMTFT1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8954353c4f829ab65ab1f74af22525bb51e77d4c268e79e8b17905a68070552. 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/QMTFT1100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf513a9aedff3469c5a1af3dd08401bc0db20d93cd4f6ce2ce3087fec6874194. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QMTFT1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0814d22a3423026e7d5f1048e4f096721965ede4d19640f982065f75c7eefdd. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QMTFT1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58108030f878a0410d888723a06301b54763016d9fdf02f0c7500ca6d37a839e. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/QMTFT1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc716ed7a2856c77c35e6262ea6348c6ea38058443e317fa72d7d31574dadae7e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QMTFT1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c25c2c2dc5d9e121906ddd51901f317b367d0648565a0a9b110043fcc129e6. 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/USCGJ0512754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7fecf0a1fd6a6c4b3d3301739f6e16ad41d086dae133e3f756f30f6159c47a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGJ0512756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21cb53f8d5df950d83f09599450664f47e264d05f7701f75b8db5d800bc64ddd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGJ0512757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf368a87a948d85f63f871ad52c4ae387541d15a70467e7a9ac28be8f2102e3c1. 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/USCGJ0512760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbad3f46ce4e863b6d130e626da654f04c318420ad439cf92ce7aead99c2cc4. 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/USCGJ0512763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff164b357424368111db025e42a645b298cb5049a64ec6b6b72b97be40e4be18. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/USCGJ0512755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579d6c90c90bd6bbaf1d45f2a38dd5ec22c1a9e6b9ca4f8108991525177264b6. 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/USHM21930595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e379f37fdd5cc0bcfac2dbb71ac96685d00ae6370cc12fd1eada986d1fcb457. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USHM21930586.