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 0xbe08b6af206c4b23b150c977226231168f515642d2c69311e92e6f8b68334706. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edeb6fd6-30ae-4489-b663-ee13ed3000f1.json and https://artists.proofprofile.net/proofs/artist/edeb6fd6-30ae-4489-b663-ee13ed3000f1.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 0xe77a8fc3b0d19f41bd83713d4c13df67d3b8e747e40b5148fc44305d2ceb9fde. 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/CAC6N2200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2701682f2c11b598447ad079474221871c1956fbbec745c264a647c6e6d64dfa. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/CAC6N2200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276ef91f97ee9747179b4aecea334478b66c854fedcc284da5de6b0e89563398. 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/CAC6N2200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3571fe4146b865e6396de493e070d213a67bbd104b572f8d66aa5d19fff6c71. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/CAC6N2200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971ccbce15a393a27d01d8d52d406d14fba61bcaed64b30b1779032db713a8b2. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CAC6N2200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4530e48116745ab008594b76a94b0cff8caabe0613f0249612a71b5b93d3bd4c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CAC6N2200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe933c6970cba8fd21373deb971f8fce0bc3454d30d4ba384d0c44a0402aae262. 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/CAC6N2200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd74fbcfb03fb953cda840726c38ae073cfa13baa5393e5f48622451c5547b8. 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/CAC6N2200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf11d7523d76b27f6d3d51791cc22356253083df5915b42df37237212bac271b. 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/CAC6N2200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79df060cfde9128f35608b1edec6a27c6f94e94c074c4b0447cc2e4cfed5ecf7. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/CAC6N2200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a46173b102be0b2aec2bfaf079147254e8c37a56ffd2eba5bbae1266ace6f41. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CAC6N2200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad90bc28683657adfb27fb15a6d8dc06dbd422c24742fc9e57d3d20d57bf75b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CAC6N2200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a47402eaa8c4a66cdb35439bf6fbb791f374b5f2012994c48f2bfcf3752b1e. 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/CAD431292801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffffcbd04f8a211dccebf0692fc8aa40ec994fa6536ce6b3dc18e1ba969cdc1. 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/CAD431292803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401f6a14111c5ae26c760e9b6ee1a84581c04f815762e4b1f36536dcd2458c12. 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/CAD431292802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a798b7d2f6dd923ab0dbddef4455bdfd06879b701148cb6dac7452609cb69c. 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/CAD431292804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea237dc7d4da5d8938adcbb49b5bef38561dcbc5358e72412bca4da1c14e890. 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/CAD431292806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df1cb0695483492faea31d072e9416d8b14a7ac0f927ac5563ad67a6f4669e4. 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/CAD431292805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e91cc178a79d61e70ef7dcc34e5172d26b476e2a1b9b4aadac1e095cd40677. 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/CAD431292811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed47d36563c6ffaa7d3df9222fe899dd459819801bba6c60b78b761425bab5c. 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/CAD431292809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788b409446b84d128852d2d9b5e1b76621c3707c0472ee5cb982c3b71f702833. 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/CAD431292810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2136e6c5732815b34033386d9ddf1c4ab9496cf13ee1a5f69973bcdafd707fc. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/CAD431292808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe175d570cf503352187fee1d01fd8977117345184b920835f261bb35c9f00928. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CAD431292807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d861c93051833c89cef85f15026e88b72cae2f65d86f93324a568f44f6a0d46. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/CAL549900115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c20e4e6d457b8a3ce4297920614ee5a8135758870ec10d77a64984cde6915d. 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/CAL541900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc671349d75fa41a25d6a7d94fde9b639abda382ec8bcf1aed68fd9e0d3df2aa2. 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/CAL541900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187467c3e37b196e4acded09b01cb70c9b86d991fb3b160b675293c231e9aabf. 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/CAL541900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c24b58dc02643e49ef69de333361c0bf4d82b80d1fa6d67d312881d4a442b62. 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/CAL541900118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286ef2238e075c96580d2d5ef1663b61d79ceccac79d1d5d74ea3830a15cf609. 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/CAL541900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a18108ac88052245bfd06da1898c742ec9d42f057341c5eabf6bba69ad7b273. 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/CAL541900116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f461e824ff1cc8c677ed7568fc9e691bebfd49a2839763ce7431222f3bef06. 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/CAL541900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea28e2efd482b7c8c2feb71b75d0a9e7697d4f5ebea03a0d0562cde90c2ebe65. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/CAL541900107.