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 0x390028df51165a2c41b17c7bced9c3bc77fb11011e65233e58dbadb3823cdecb. 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/fb47ba7e-98bb-463e-a48d-486aca1cfb31.json and https://artists.proofprofile.net/proofs/artist/fb47ba7e-98bb-463e-a48d-486aca1cfb31.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 0x5a1b9939eb10feb2351d6de6d6f8896d3b3af62d7aa4000a7247e5e29405493e. 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/USA2P2320841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b240b446059b3ebb0a01c66e3406fd99c6ba7746318ecdd3d3ef74ef55fa0a4. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/QZNW72245076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2d5ba7a7a8326156963b462f5f15d5583f291ff71361c85453eac84d835d9f. 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/QZNW72245078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae88ee672bc2147bb9216f85d32bca54294bfc2e19e9a2303ae701723257d07f. 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/QZNW72245080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14ff65e53776236f50aed717eebff829bb4e1cfe1c6762d8d7177a47b47f7aa. 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/QZNW72245085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac76f9eb563743d5a2866cc4a43475f3b1ac60d769b9332ea497c2e7b761d107. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZNW72245077.
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 0x326edba5018d5b22aaff38d62bb2b995a8249ac474f4ccbcb0dcefccedb0dbc0. 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/QZNW72245081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ead0e40a971a427ec3ff54a5969939c7841b47c9637018b66ba5f379d64f81. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZNW72245082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c26e2b3a8d9abd5a7596c6a07afb869a8d2902c33d8c023462b3fa5580ae0c. 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/QZNW72245083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae81e66f63f4b7a31b82d7079c13de27043a3b67e99f88b368e5a72e71f6ca7. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/QZNW72245084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5763a2de3dc1153d54e53502eb75e979dab19f554f0a6bfd3a4e28ef49a71a89. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZNW72245086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d71c8d8ac9b8f5c2f59c75eb93b605143b05548e400076488cca172cd8356e5. 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/QZNW72245087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb8207e87e0a3726f1dc74b7c1a47bb153a4776fd2100a5255510f7e55a6d98. 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/QZNW72245088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1d4f493599a71a3bbe6300da73919d4b1a973797902e5dc6a717eb23ccc0d3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6F2017652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3fdfb1ff256a1b26fbce9ef88ed76283b71fbbb6c814cbbdfe7dcc620366e5. 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/QZK6F2017653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8d443f0633dcbc1eb4003a2ea52fafac35ea68c3f75e0f76acf85da9a4e3ab. 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/QZK6F2017655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae54fdb01ba28f57964f92eea2d85c02dac9753164dbfe37b4c0632f9e7b222. 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/QZK6F2017657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463f1d6284d3fb101a53e9144100436141bd060de2da007f7a9a11bec1725202. 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/QZK6F2017658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1c9ff2ceded0b8560de800d3e78a7b2e1e13654e17f5e65b851f909a393bb9. 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/QZK6F2017660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96eff39af92346e71870e77123d882600f2ff1e75797888a0285c3ca31a8673b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZK6F2017654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fbed14cf557ba86e8701c7485cc503936a3f52b6d8f0b9bb855626554c7267. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZK6F2017656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710ea60a1d7772581ff3d547ee28ac3f28a60ba5827cf3283c17e26edea08b45. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZK6F2017659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd843aaead0dee844c12c90743f7236147c8715c2ccc27ac5bfcd808c360dd45. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZK6F2017662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead7d2ebdaa488ed30a677defca7e54b936dabe9994075aa6ed78f4722832e43. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZK6F2017663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0d66521a1cf058325b9a0e7a14b77543e8324af47eb36a5c99b0e6916ee684. 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/USA2P2332210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642be0905f56653814277bfbcb699c42f350c8e4c46dda81ef8cb1f6fd578f2a. 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/USA2P2319556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c254b900010077053d104a964c0ca250060be2ad5f0f67a48aad483fca00929. 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/USA2P2312449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e08aecbdf5de0a8325572eff013ba67a19eff187eff416338b5fc1d11851315. 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/ESA012275802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb208429738288876580c71954a257af16c707ab5ed4942529e361c783fb818. 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/ESA012275801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9367ffad2e23d5e0c88c0868074df4e4a05716f43150e588e175ec5a8e9d1fc7. 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/ESA012247574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef218ec2d662620b5a7f29049815c113ca963570f4417095c52898830c670cb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDQH2252502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0e1c194a0742836549d17144ca0db0ff4ebea2605ad5072826dcac18c51b88. 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/QZDQH2161483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8308fc9ed31f4c9c18f75a4b863ca19902f89488bc326d9bef2f2ce6bac09447. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:27:52Z), 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/QZDQH2161484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c9b3d9e4d28399c18af01a0284194fd89ae8498841b5d33de27425426c0e0d. 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/QZDQH2157229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5146051afc9191b40fba0ee54a54b93e47c62c9925a1c1d3b5afc82765508450. 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/QZDQH2142244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1579168aa4791ceb07885deed7eb817fb50e98dacde6de3da43e0d70d63fe16. 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/QZDQH2142245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1584e54b69073d9fe3048b30020808996f1380f39c18296bb4179fc79c2a6e17. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T18:06:31Z), 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/QZDQH1911982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb61fe166dfc30e447658863244b711f24cfac9ec50dc003b38caf5aa11a1d27. 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/ESA012292871.