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 0x8fdb6ef0cd3884982f22e565ab63c9f58fff758b56b7b1df3d17d24f39c2848d. 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/fa4ff80d-1b17-4844-abf3-10af6c9d2c7d.json and https://artists.proofprofile.net/proofs/artist/fa4ff80d-1b17-4844-abf3-10af6c9d2c7d.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 0x3e1d43943adce1da723ce766cc87f12eb4c0b806c078fea83575a7c7c7d435aa. 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/USLD91754653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c50ca413944c52e84ee4d2218b408b6e7f103812d3db7f2e64b56ba4681a9e. 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/QMDA62117636.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bc7ca53fe8f705011f95d8c473f9ae7c642620c21c318b7bae5bb9d525ca20. 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/US3DF2456346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b368f01a0a114ac7a451b48c0493ace2ebda2a6663b125bada2655f0f44fe0e. 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/US3DF2455881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef21b5519c8b79263ebabd027c9a7b6ad7ffab0feb6307fc455de989189e16d. 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/ES71G2323747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf92e3abfa80b111d155488209a502aec42392b9a76c0b3ef854b83e8e1a8f83. 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/US3DF2456353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aedfde9774b788e23e7d4bededa401af872ca53fcf6d1a8edc0e0d4c4cfe173. 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/ES71G2325888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b368f01a0a114ac7a451b48c0493ace2ebda2a6663b125bada2655f0f44fe0e. 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/US3DF2455881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf163e6a3c309f5aecc4ae2ee4659f8c72dfb5ddc03965b6140d2269f4ddfcfe3. 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/USLD91755681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9b0d6d4d2e53cb864d91ecc14087b8d4a5cb6cd0afdc81eef6c89428bdaed4. 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/ES71G2329486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1e17ff4f2a5d4c334af9c51e387ccc3b47b941d32b25f38a5a4739cfd25b60. 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/ES71G2321086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1d43943adce1da723ce766cc87f12eb4c0b806c078fea83575a7c7c7d435aa. 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/USLD91754653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9b0d6d4d2e53cb864d91ecc14087b8d4a5cb6cd0afdc81eef6c89428bdaed4. 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/ES71G2329486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac626f1f5b3568dc28647a1c4bb5bc241ab291125388da4eed41a4c4190cf45. 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/ES71G2331328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aedfde9774b788e23e7d4bededa401af872ca53fcf6d1a8edc0e0d4c4cfe173. 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/ES71G2325888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9194f0a9f0fd8ff12368c9f0ba46016b4d03dee01547806291bc7aa84ffad2. 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/QZNJY2292215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c4158448f766a9c052cd229a91a36426f47b2721e4bf89f0905cff2b408e0e. 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/USLD91738971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1e17ff4f2a5d4c334af9c51e387ccc3b47b941d32b25f38a5a4739cfd25b60. 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/ES71G2321086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d394db936aaff48612bb67b7527d058740fbd534c056386dd465eb1cd87cc1b. 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/QM4TW2237615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802d603af0aed69aacb620db7846eab105db109bdc864eeacf4c4eeda3424452. 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/QM4TW2199713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69af443318bb2b09303dc7289f75f8e2b771b72ebdfdb5a9b0f883aa23ad014c. 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/QM6MZ2112815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375649c3ee828a880e6e6a1f6d08fb29c3cdcc3ee53d5578226c2a874b0b3281. 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/ES71G2047200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5392325114282c3d954159acfcee45b34dbaeddc6dbbd2dbedc7bfc0284a686e. 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/ES71G2044069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5412b966e6f8c02f60c73c55d8c78ccb0725555b749a867e390e3ba88281e0. 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/ES71G2017958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f471c3932e8831aa5d0e5ec3da2ab24ed111af1f68e7befcc572b0bc7bc3cc5. 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/ES71G2005973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3536864aee4e8dd037f4069852cf5501ddb605bb069af7cefacb0171f48407bf. 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/USHM91936039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f59ad161bb3a61c080bd7b2ffb66d26bddb935f65b76e1155d6f01eac892b9. 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/USHM21912952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679ce393fa70ad41c306f8b9e00cf5528793bc9a6b7ea1d013cb4eea437f4bbe. 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/TCAED1925749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cbdb3c08410fd482ec3678868df59e9e95a48c831d6fdc5e854dbba2fa4d9b. 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/TCAEB1905568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879b2b2d11e6aaa91466d529dd3eec059ff0ad9aed14cac116aa0d62f980be3e. 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/TCADX1897275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055cc83a0bd0b3048326e394972f6518652fd9819c342f168b4793498443e488. 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/TCADW1868773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588d20652f9d6dc349b25939e9f41e23772b884520116dcde71b7938c9406c25. 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/QM6MZ1894602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaf153bf8e3d7e8b9fd982e08a5d17a420b92175feec1ed577559fc18da54c2. 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/TCADG1717216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d1b04d129d106817d165ce4cbdbcdc6a9fbb65e8705fb8f6d840d15ccac078. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZW9N2205032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21e4426f05628db62b0d8dc2caf362b89115e0ce15fa0628fced8dc24891007. 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/FR26V1561026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30bde4751a7e48d043b42382081bfb7fc8ae9b19b63caf8e9b96116ee953357. 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/QZHZ42299829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b25d029ca21f24ba980f702ad2f37c7e32805d5df79b1c4a51ee61468e98e3. 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/TCAFB2057172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1571f2d57373a73c98952e8b12c3e3f67b75019c941a74bffaf9e787e7127ce7. 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/TCAFB2057261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe238a7ed3f49b08f06a79b3db6e9519ad78362b3610d29da9e8450e0c178ca57. 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/TCAFB2057270.