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 0x91859aba9315296bfcabfd1e9439fc691bc45a2ef80de08b91b98f7cecd7a6a7. 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/864adc92-f54d-45ea-8b4f-70000bbad82d.json and https://artists.proofprofile.net/proofs/artist/864adc92-f54d-45ea-8b4f-70000bbad82d.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 0xf019b6fb33f8484c3cc75883f83a214659718ecf29c2ee6f40b1a7c2c0f3580a. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:32:30Z), 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/TCAED1942210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4eed4e0afd493c05ecad88523509419d616cb58eb90ea6d0675f4d9f0899c1. 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/TCAED1942324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713705ddc0559317855402216f088f4c2a3400f2a397f23c4e1d10aa28847c8d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAED1942089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396f3179e290de0a80ba23254ce47f4dfdd6c0a96d103b4f9708b878f8e6e01b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCADW1880844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffff3bedf948d6c21013480af2bdd34bd94704b7ce3260e1f5eee601810115eb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEC1933913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11f3623ac291295ca5f8007fb750bc8805e2e2fcc96be6ea334885ad5d9d6c5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BEIY41900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56b98c4c626476ee02eb8f073d1af464131e70bc480ba4bddcb3d60a3961806. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/BEIY41900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c1723f07c7812df68d3d545fa24dbc2ebe047e0741340eaad6d1486b862725. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/BEIY41900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bee31453136121d8574cd85edb3729e86dc53119819703585f47209edd94ce. 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/BEIY41900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01dca03f0bb5e229f8112612c5b504eea38ba45e33776273b6692e002a0a625f. 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/BEIY41900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a6aabd46251ee2c5ebb1a73d37922a48c312b2c98e51f9ac207c08b2da38cd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BEIY41900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cf64b523a6375549acf7ba6099ec6d20ca5a22599e48368fe3fc22b75d4389. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:41:56Z), 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/BEIY42000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21846a2285abd2e414b1900e5746f58875e6298e17533953a9ab36aa6a3c78e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BEIY42000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c55a3ffb18382fa562976c33e8df0ba7e8b1424b88d5317c518c54a7bee66f. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/BEIY42000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c0f903cf71a1cf3632fcc88677d46099f3f00ba1ca53b5a8cf88014d30ffbb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BEIY42000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85418b82d67181a481a4ac31680db5dae14a5d104f5a32f3ccebe9c7fbb59788. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:04:33Z), 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/BEIY42000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac2070211ee31283a1fb6a26027c5cc3649c20b0578f4ab81f259720511370b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/BEIY42000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de45634fd95d5e55d1434805b70a9631b321e24880bcac9f7f3dc6d7c1812fa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BEIY42000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb359fa8595d84198bfaae684787e8152d07e24e05eaf7f33df6b1a1c646892d4. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/BEIY42000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95df27fdca4fb702265d64d7443ecb46b0596d48aa16ed60a7f333fb647b17a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BEIY42100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5634384c818dde82921f7f59a660cdd427978a443196630a73926e5092b48716. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/BEIY42100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a757669b79d6a38b0298e55920ebd50268a686cf9c11e4e4c9dbd207f38b1d9. 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/BEIY42100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5e33c10f4062b162257b98ad8786415b2ebd38d4b97ed677c1d69f7333f794. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BEIY42100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11de6000583e465bacebfa5a71ee174419d832b0186d996fe70030f0ab93baad. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/BEIY42100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5e33c10f4062b162257b98ad8786415b2ebd38d4b97ed677c1d69f7333f794. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/BEIY42100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95df27fdca4fb702265d64d7443ecb46b0596d48aa16ed60a7f333fb647b17a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BEIY42100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8494e62df00c446c159e53f5f4413371cbfe77b7fb2c536f0764d1d80c6329f0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:43:41Z), 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/BEIY42100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a757669b79d6a38b0298e55920ebd50268a686cf9c11e4e4c9dbd207f38b1d9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BEIY42100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf037b4f1d71c09afc00002d890594fb32f1d7cb140bd3f0650378d983f5c33bb. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/BENJ12400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6632d1b4501a0bd4f77fcfd488a6f2d4cda9b537a911f3a4dcc3f0cd815d8ea. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/BENJ12400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb27021a3541b1b994d9aa1815341cb65c1d564ad95db6cf1c6c240942295a76. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BENJ12400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fe54eb4e494b7b0f476221d01418880c2eb57df3ad3455a4c460dfcf25b511. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:01:03Z), 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/BENJ12490007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d476417ff396874fdf5fd9401dc6330f603e622b44c8fe20e3a6189a3e052ce. 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/BEKV42200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58128ee661385afe2dc63f4659bb7a884951c62e36a67bee951b2f4b3942142b. 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/FR8FB2300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed3caa3b4648a74c6d2535173a4868c36ff0a4f3649e38070d44a55c8651f17. 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/QM7282475927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2d1f87bfa025bcb611d8a19a5e7e803384212552145cd6c07368783b1df2d0. 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/NL3BN2100027.