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 0xca92a70e88052c93be7d42040d738bc554ffa1e1614c39ff48ce26edead9f73a. 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/985eed55-cdb0-485a-9331-98a51733e270.json and https://artists.proofprofile.net/proofs/artist/985eed55-cdb0-485a-9331-98a51733e270.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 0x78fc445bcaa5a3c87edacacb30667eed9d40cb3ed7b5da3e596b097a90eeb419. 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/JPZ922011880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50e52c786b2492a3e3e0c701ff89cadda82d18d3974ef738ced761e11f32dd8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JPZ922011881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0245d0d428a5da2e5d2e03e1796d3e18642eeafde1bad3080b43f22d29567a31. 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/JPZ922011882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23397bc2f86cf40962a2419ee719835418ff47400d3bdba1756affb0a31dd01d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPZ922011883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b4dab4e598aa86f805aeb95be442b75059ea397a4aa5d4db719d212ec28a1b. 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/JPZ922011885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bd08d5846bd6639c9133cb4bffde9e27abedb049bc8fae559163807327e5bd. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/JPZ922011887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86f5b197db44c4697f4d272f18fea0487daf1c0098aa113446d2d2ea5fcb198. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/JPZ922102994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f92e9d9f6018a6cd9cc68c22a455188898f53e2b4ef625b966d9401a5aac5cc. 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/JPZ922102996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed542afaa027ff9128f67ff55d02cf35531910c3c26aac54148a21c0cb613e61. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/JPZ922102995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52220780d1671a3e07e1ee5ac38998830ca0da4f8faf93f8fd74c0931e56f52d. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/JPZ922102993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a19fbd474a2dd65d20c6400f70c0094d8eef55745d091cc33d79a999b2f785. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPZ922102997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c3f3af7454f5d62406a231ef268ffe26ab2c8bb67926dd450e31ac60db11d2. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/JPZ922111849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1147c4f206644b55df5ca54988223d187b69a809d595e596d910ab6057d83d. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/JPZ922111845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468d2189dc3131ceec1daefcc2b4c57b23f401b16aa24a18721bb3f55bdb01f0. 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/JPZ922111846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dcef2a2e9e7d247ca6a3821f1fb001f5c5f941ae798e3e5b24340500268af1. 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/JPZ922111847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ec45da22f4049c52738afd88a03f13ec20120728fd20b181a6f950c1095f3b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/JPZ922111848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95d7e994e5450ccd88ca379335b9cfb6a8d4f5c77e6192c27ccb7cdfef1ca55. 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/JPZ922212802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b542eb67842248816f32fc2c28d39cda5af00aeaa8380f581d10e7a5bf5651. 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/JPZ922301029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea82e4e257f1c8a650153c897a521443e48b1292e741c3a2dce6df14ddc4ea2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/JPZ922302699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2791f74e47c3e511ebb3baec6a7456756ac513bf9808a5d6903f2d661c76bdaa. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/JPZ922302700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15116511818e94433d77409397cfebbc008a70e7660fd5dacd11a0c85661119c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/JPZ922311045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15df776c10319c580991cbb2a13ac979c22c56bad93e299e3dc730073ac6dc6. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/JPZ922311046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87bfae9aaeed3a7c71d1341d802d1817fe1d115196f549c390c63a41bd959e5. 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/JPZ922403442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aed7b531d8032ebaec0c25d133eff9afd822a57d84b644bbaa3539378e6ef42. 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/JPZ922406174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aed7b531d8032ebaec0c25d133eff9afd822a57d84b644bbaa3539378e6ef42. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/JPZ922406174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc237d54ab8cf696a24d926285ccd7cd734d8589e41aef00a44c79a7ce0cee567. 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/JPZ922406175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0d19ef04eeec76ebee6022b0f233d7b101d5364a0676941cfe4edbbec32e23. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/JPZ922406176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca501dc8baaa4ef6f704c2042072b1b2dfce8227dd7a497251fe75d706785355. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/JPZ922409018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21677fc5551c8b3f9c737f48071869e7fc56412c15ff6b8655d7edb99145b1b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/JPZ922409019.