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 0xce5a9d344c0661e8817e4a0f5267b9602ccbcbebb9abb8c9c8bed49c8c6f29a6. 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/de388bc6-ffd4-4437-b39e-9a24d27443eb.json and https://artists.proofprofile.net/proofs/artist/de388bc6-ffd4-4437-b39e-9a24d27443eb.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 0x69a2d8fbfc7bf0a516701f2fedc8f5b3fb8435cf74f4c6adbd3d2987a09bb5ee. 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/CH7812100439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2714b4b029b50fe420d50ce27f087db2d1fef725c1eae54a3f8093cdf1495f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/DEAR42172658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a2901451c11f5db68fe02c7a16d8a3d54d0cc4fd53bb726ee6da96f58ef608. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DEAR42149249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7fff77f15f981295efef98c60b82a3147715098c52992b91af812a331eee85. 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/DE1JN2347557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166ba07a0578927498c8ab1e7625f1b94fd42178b932eab99e387bfc9de4a151. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DEAR42459002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fc92dd766db829b0ae0617aa11caa168b2c27572cd1f41070739358adb67af. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEAR42400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f475bb9f9dcde28201048034b960347f8db60069ff80a2d9d96128a4e796fc7. 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/DE1JN2463762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1234e24302b04c19c4d0abebefcd4df81ce1907a03cfa50c857538c0033094. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DE1O62483171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735de30db336b95803dff9bfd852b94a37fbc352794b23ac3530946c497e36fe. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:49:58Z), 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/DE1O62445692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811469cd5d6f06e1186388ebf03bad592a61e629110736a8b29b5f52ab5affe4. 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/DEAR42582568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7a93ef2686e3ee8f3c5f4cdea89009ab448363c2f7c64217ca6cf2f0224f5e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:29:16Z), 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/DEAR42573211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0010732c830d33f4d1b8ab370a45b8ffa9272ff5f3e09e6b57e24bc070071f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEAR42550365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8485b491c79ba4cd9566cfd07c4d329f821f4a2d7fc7f14f316c25b0fc7f0e8d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/DEAR42544288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc56b1c7b462db8d1094ce3bbe37af76195cce1d2d62380d35693524a284c532. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:49:43Z), 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/DEAR42538861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96b78e2861a78bf202a1bdf44e73de9fc0d4fc500cf6212b835f5a756b14f3d. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTB92567936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd385102f53138ee128b80fd58e5efab0ff59206c2f747d83056638fc6adcee5b. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DEAR42531964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097d12de976ff8f73d6990a9aca3b400dea0965459163235ad123d382b7647a9. 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/DEAR42513603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6250fb9458137612c6a37949219b67e80f15bf92a2b6633ab26ae997b32a742. 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/DEZC62125026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c21dee5c349a7792c610345f994d29ab812eac68996f4b423b056d5a70dc734. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEZC62111409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6834872c819af429bebd76e867f10f137818c6edfbad67ba31897cd264a1bfab. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZNWT2130482.
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