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 0x3fb645e21f6c768946252eea339106e2cfc9d2ee0a2accbc3b165b6a76c03cb8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b20552d-e001-4bd0-9dd7-ff79c2cd1374.json and https://artists.proofprofile.net/proofs/artist/8b20552d-e001-4bd0-9dd7-ff79c2cd1374.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 0xec3903ae827bf8add970b7c81f7118e69ac7e281277d80f4248d65fcf820ff22. 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/NLCK41017374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0b54a8ac18aea39b3e22c2bd0122f9835e85fdb28b77323dd1c796b194d488. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/NLCK41017373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e1fbcb27e0d53b5c17fc82e1d0a87431f0c852571666dfee2ed13b54c0fc28. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/CA5KR1041162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08a2c168f46f6c70bd7865c855e66810e2739a8f8bb43218fb19b31a5af6b0f. 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/CA5KR1041163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6f192d357fdedfc8768c932a48cc6a678a5efae26ca2e268df100e0a6232f4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCGJ1645369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a826d40468162f3a97e2a39a090a0666ce60127dddf7b29a7858cdc5cfb08cc. 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/USCGJ1645370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734a6e911b0d38e558edaca236a88ad2140469bdcbca64dc900f149281703adf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCGJ1645371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1befcf68deea37bd19cee18dc4a1be49051b61f0ae09275f1f14604a8ebacdb1. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/USCGJ1645373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c1b6bd811e9e16a1e1f75f0c57d4e02b6f5e4cfd6843dcf1bccb9834c1b5be. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USCGJ1645374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fdd75bfc6a8ad2bdd6c702f9f9dff2b3be7564bb69ad066910372778af6399. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USCGJ1645375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb37dac6b1b7a8fec5ad31c751700dd2cc7a1cc479ef8102a90845b41a6d1fb. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USCGJ1645376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a57d9fca6fb42bcf15818dfc546e9171f9650444212bb1d0ca569b0b528bb6. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/USCGJ1645377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d39b6110e8f24e5c9406a74102a639007767bb8f0cdd2b14bb97f50b1144a8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USCGJ1702607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027ff5e5e5e1fcea3102743c27db3922a7fec46fc92eb817ba558590f1b31765. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/USCGJ1702610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1d1890f4c0be28f232cba6b804631965a7d355b5abe2f63b637d300448aec2. 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/USCGJ1702611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054a554264e46669f3d57368ff509adc640a081c724aa0fb2322f0a2668c263c. 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/USCGJ1702613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28661606650574c2dc59092aa93dc06876686a88cb74d8ce5272d950732e1de. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USCGJ1702614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb327c2b5ff857b42e0c6a31ef02c23e2a49495c81c5c62353f1f79a9d45820b6. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/USCGJ1702615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79f5d720470df0967fb0952e912ce1fe9237c6f38399403ede87313e07bb8d3. 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/USCGH1776394.
Neven (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd511f6d8330fb4f98f2493a76b3541a64ae7b2b7d2abdfcb9c02c79d5c7d42. 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/USL4Q2233097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af7e5fb4522dbba610754607f66968c2fa6406d78f349f3899fbf1366199547. 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/USL4Q2233098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f597af056ace75aa0742081badcfa91352e3d4028f392b6733d6c0ebccb8edd. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USL4Q2233099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1741f9037c54a7fcf72c91c3206b73bbb66af7e095f37dbdb52805436116908d. 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/USL4Q2233101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68d65420711ba9f9c1094b2d1123610f9839cf6b0a367f943d6e69546fe7ae0. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USL4Q2233102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9228207e47f18c9f434f386fcc5cfa3c61c428820c14484537bd7d81b20957. 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/USL4Q2233103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfae3f7aa904236567cbeaa3e487c75a2dd4e6d13b9aab10985c50f02fe224e8. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USL4Q2233104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342fc6f19ae86e97d50bf452e5375aef3a28cae69189c2d367778c3db57fa25e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USL4Q2233105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1f17e39a3d7867a0da8272bfb5cc13fa06697c828986f26cf52761ce10b305. 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/USL4Q2233106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd708fad25d0db4deb2305489c9caea5774e71e60c818ac901dc22228c6b6bd5. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USL4Q2233107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3578ad818c8e23f042038998ff4dfd79968e205eb55ca9149a03264fde2815. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USL4Q2233108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f14985ee8bfbb358bdc57829f68722c83c25dedcda9e16cb9e9f0de1c634b0c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USL4Q2233109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9214193861b416f248e6eff51b216bbbfb3678b75681565b2f3dfec782e8acd6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USL4Q2233110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733b9ba1f90cb65f9e5f218cbd4b61f2f2696b1310981722373c5e1fa91e649c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USL4Q2233112.