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 0x6e4a3524ad79c4fb83001add9993e9ccccd1962da49afc79a894d050007250ec. 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/f915ae50-2ad2-4f5e-8402-22a9754c6492.json and https://artists.proofprofile.net/proofs/artist/f915ae50-2ad2-4f5e-8402-22a9754c6492.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 0x4093dc118355e9af16eb391f3bb20c1e92b0b39f828b65c04f59d472f940f13f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAII2458365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd9434b7532e14cd4c135db9115378464c80f22bd37a5f5c0a4e6fb4da56221. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCAIJ2458373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93a0063ec3804b221d90fb72703bb39423618e16d735fd08f9b4d57d85e8603. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/TCAII2458377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890caa0639e9577ee2e58a3e5f04db406d4c3a760ecfa2f60717effcfaf10a78. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAII2458381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855bcf0ef3230d6ab40af376d7a23f160bb18a682d3ce1b64310d72003e0ce5c. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAIJ2458383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6373fe1c93833539c98600e2beff9c10990ba2006700c108be0d8e2013992b3e. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/TCAII2458387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ede6c7c1b64b14611ca3ab4a5bebce42535d85bc4bc9046dd321606b3c324d8. 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/TCAII2458390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c00a3c810f218fbf769f248a1dc5cec1e33d289e5d31e5b2cc36520fb71353. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAII2458392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f43d37c4f7e44de905f94ef7656170c635f8a714b2120233d5c955ebca5688c. 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/TCAIP2444646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd258f1958e6a6739a5b4253d9e0961fdb4f663bb89a3a517617f874ccd3538b6. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/TCAIQ2444649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90ae7b6c74363c785d1d31ce3113c756aab63fa45130ef92950133a8f8a0af4. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/TCAIP2444653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bcf106c79369f0a5bbba482b337699772eec523fe25106bbccf00ed16a9afe. 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/TCAIP2444657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0f4ee69c1db41fef3b3b1eb80fd140c570ef4910ae4496400dae8877bae078. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/TCAIP2444662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510536959736a25f92930aa0d000fa04fffe579b646794a8349a9e835745407c. 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/TCAIQ2444666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f90df85fd567f86d62bafda642754651315c2e97b70002f3e71da4d50b1dde7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAIP2444672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb25f132d4d592ea637d6e92392d81e4c77bd9235a76daff170c2d8266558d76. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/TCAIP2444676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda89e918e2c0ef742f5f35a492556a59bfa70c9ba4d6565aa5dd934e46a666f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAJA2457335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6c119b0e617cb3e2cbc5086fd8ba28fcd9cd133d1525d4da9bdc43ac5eadc3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJA2457340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf01681698b31bfb91238f7d5d54139f657ef7bfdbfab0a226578e5b7f661e54. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAJB2457344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739054cff4ff9d61d42a98282ddc7e8f07194f51413fdae915d4d8b5e1a8ef4a. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/TCAJA2457347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56204910b0e62dcd81e6af4647b4e9cb3e8dffdd05e3d0622921f21401a6bc8. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/TCAJA2457356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a19067a5801a6efde7ac03db1b0bad9b5e7b675f9aaec2006c71676ca6b3df. 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/TCAJA2457361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7e64d622e8419445beb9a96fd81bc5df4dd175e75d6920190d4d4c71413592. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCAJA2457366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ae7e0f9a7ffdebc8b800d41616e25e531c0c057190b5267106221b782caa2a. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAJA2457369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed877704c6ce0101741338742ad0f4b79f6d00daa983a0fde45d449bac0859e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCAJB2456060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132c808d2b13b4bce0251be82e130be31369261f1e5213f81963f09d96f7a3ba. 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/TCAJA2456064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd57c77b12e91247a2bfacb62b4f5e03c9e5caf6fefe1bcfb06ad5dd9546a1b0. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/TCAJA2456071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775de1c3fb3bee890c5f8c1d1541804d44185400db94eac0a69a27ba801345cc. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/TCAJA2456086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf54d8ae432f7156fcc6b0a6d19deab8fe914b332359a543fd36820adc6743f7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAJA2456091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4431b0214f7b2242449e947e9d6e3ce9cf8bcabdc95291b40b23609921109e. 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/TCAJA2456096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37987ef50200272d4f9660af8027a23dd1c063565830d99729fcf439d15c1867. 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/TCAJA2456099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c28a4e5f89b98c014c8d36e4fbe1d568afeec102300476e04880152a07a5d9d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/TCAJA2456108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72eff67a282d764ba16eac7b27325a7d787dd83f7c73b1cc1743a3ea044999f2. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAJC2410234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397642fbacdf28e2bde4eff3efbd3e5debff9ffead5e9df7c739b4e783f8ce11. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAJB2410236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb83291032703b3c9b2003f0269cc2d5c4f8c75b837eb9433184ebb54c72e2a. 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/TCAJB2410238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53e51784dc6f18087c49292dd4f3f53ff361dffb18314ec1145d0b91f9e51c5. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAJB2410240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a27cfb87303adeff4253f250c9126d6ea1ba6f171c92480c6b0759853fc942. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAJC2410244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f2d3f856c9ef089ef5a5631a7d14a5dbe20b7312cd70590a6874e4ee70c4d9. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAJB2410246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9686cec65f7e729e328a6c1658dce9b9877820c556ea086c6a5da9f5f6ab8c7. 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/TCAJB2410248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d00ed289531c1013415e83dd61a9b73e4294b0cc71f9526a2b6c9adf1c82d7. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAJB2410250.