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 0x3fe35ab8fabf477846d5b4fab47c658df232b7a374a0cb4e18411ef3268d88e6. 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/f20aafa2-a4a3-4760-b81c-de89e1ab9303.json and https://artists.proofprofile.net/proofs/artist/f20aafa2-a4a3-4760-b81c-de89e1ab9303.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 0xace1d80301fe495c54fd1fc1f33cab3e0d7050a60904944ef69128691228d3ba. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FR9FA1800720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a336cdb20806038058e5fd693de9773d81dd0e33693a548428966ba81b5e62. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR5R00910282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d11db523e9c57816ea8bc8d52097b9216b674963ac881718426505a9ca89740. 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/FR5R00910283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd140f53ff9d3c5d773e5d88a9af290d8e3d94a4439b3b11046bf9101d5174416. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FR5R00910276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2d0c6c10b5e5da1d36c5b6fc49301b5e282b39d4c902686d2ce1ec83c7c9a1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FR5R00910277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6b0090a296c77ac9b72425cad43d912761ab627fb8ec957ef0726aaa1c3bba. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FR5R00910598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70069a529b8cd1715d2c16d48d9f0427e9fbe0c6fcb05c9e97cbcdcd7249eca. 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/FRX762016331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c81040df214e5e367b5a6baf63bedc532a5d41a00d55dfd7fcd33311616c47. 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/FRX762016332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb4384a19cab48ae7d7fa4f687401a6b9927ff4e6941ae1c15ee8fc9f947a5f. 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/FRX762016333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28be828c910f86f1db9ef81c5a36f7b0b2ffc47d5697f98349d8b3f2771fc8f4. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FRX762016334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee091640dd166e99bdd1356c7003c008e077abcb547a6681925ffa61e4544dd5. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/FRX762016335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003b786ef3e14454f254159be552a75d24f7f58665276407b9d7e477c4103954. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FRX762016336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61494af814d38c47dad3735a5548c2f029dadef5a27cdfd84dcc8be57e1cdc6c. 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/FRX282044434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98113503bac748ec3f495a65f759be906c317b290503e810661a6788111a5295. 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/FRX762016337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a4f8983d93b8233da16862d67b1b7289e698a3bd0a4bdd5a3f64838a1b6b18. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FRX762016339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a71a6e8fe60d1a56dce11ad8ebe3df19c1e86425a1e2a7fce467b243271c03e. 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/FRX202059213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a728a269fa5cf767fb5775137ea02b650d3a335f92f899cdd597130812fda0a. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/FRX282001690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337bb2ba781923df71ab0cf879d8dfdb4ede9180cdf062b5233a3b9d11578dee. 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/FRX202018927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11295d14c44a2ee7582285a576d2889a023d60836053ecbc60dec34a9c2eb7e7. 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/QZMEP2376032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff8306f6c19b04ef1b1f29a6b0ebdeb5f2982812774bdf375bf9f18cf2cd13b. 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/QZTB32396640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f86b7c4a025790c03736aabe9e0712afa5e6cde6f52aa6b1e94ca37b6fa132. 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/QZFZ32470663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1b0c71b32e7ca39206a6227a63f7e9c7c9d07d55dc5c45a8d7a9b32e988f55. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZPLS2404448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fadd0425134269175f18a497ae39831649aa2d0c5b2c8140ea96ee1ec46ceb2. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZTBF2428501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf6ca445c2553dd14e6d2da428cee9df89eeacc0f77e6ccb483b7d3c6940fc3. 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/QZZ772444139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca9f9af522e3aeda32dfd036c28769e894ceead06c1c48d9cf55217c354e961. 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/SKA012300459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6263fffbdbcaf239ecc9acef5737a0b51b3b73b25bc33541d39ed1ead75caa. 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/FR9W12011326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaab75b39a96d7a443a9d475a281e435908795ac4297e03bb6f5534194daaff3. 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/FR5R00908186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad66fb19b6c82d04ae3c3fd155b52dd8037a9adba499c280bac3a64ea7321e8. 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/FR9FA1800230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa951bbb749cc98e18c8945a97a1eeaee6053cfdd9a3e6b6e035391bdd5464a. 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/FR9FA1700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962f780e33f4a8cdbd769b1abfeda34a761704b62c32d0af0a8f4e222f5b4d8c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9FA1700190.