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 0xfb937bd98b0d4d5afa30e1f30cd4bbb36ad6de4999e36104acd8f6515ef1dd16. 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/0574a39c-a2b4-4098-afd8-b297b178eba9.json and https://artists.proofprofile.net/proofs/artist/0574a39c-a2b4-4098-afd8-b297b178eba9.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 0x2a854c7668cff334d5cb5bbc1aae0b5ffdf58d1478644e8c6ebb25d2d06a7c52. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZHN82042850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d6f80aca060cf8321034627143205d626e784eed9f457755b002234a193f43. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:09:44Z), 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/QZNWT2030712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3c7ba2a345c7b12a2e4858b175b5586ad6a7d3d7f5c87bbd8bb825c986bd44. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFZ32159470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f059ea61931f1ba8ec109d0278259d5f4d856590f212e62e211626361a1cdc. 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/QZHN62155739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fbffa66bfdea6ad7951da402bd45ddfd3a1064296373ca6359e55d67c6c893. 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/QZMEN2143910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076e94031ce8357dc621c8def62c293580c3797a1ee58616a9c7bb623bd35476. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWS2141162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f07e69affebe466951a5507e433ee46e7ee57d5d8cbe4d14c1a52409d7f355. 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/QZNWZ2172279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417f0cadb3f624d635deb228a7f4d45ff842cc6862f05901ec7acd00b122b546. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZTAU2156364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4288e9ba46c54d0a22b9dae8aec634314ccfb31e99cf61be20792609254b7e4d. 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/QZHN42200491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd10ea0209d285695fcf4e00457be56c7a68b51515211db4b212f92c086ae71. Chain 2 (Bitcoin): anchored in block 957839 (2026-07-13T10:06:30Z), 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/QZHN92290494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac771e4b11f7fe5cd2188637c4ecdfd3077928fb9916c552b2964cab869b4cd. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZK6P2217406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e86bccffac706e9c3a7ffbbebcba6528bd7f98f5dba3f7d6947a16c4f32eadc. 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/QZPLR2207203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7783aa811974f7a874ca55ba121cc561e942c8b90de9e9c2118bc236c429a009. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZTAY2256319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3531f985459cccdf7cab500d0e8e1e0bee2d9e3833989e435127031086a9ac. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:57Z), 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/QZFYX2314608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a58074a63aa13617b5246dffc6b2df0dcbdaa58477b9e510ff7ed582ec8731f. 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/QZFZ42350525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1605b9e29ed7d92714f4cbfb5301d64f177f2542e8ff83fa3e5e63eb1107e1bd. 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/QZES82355509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb81270babdff9fededddfc98217b125afe53d5a416390d637e5d995bd0b2c6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6J2388814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378c1be2f5bf3b6524edc9b9707cc256f317c3f87115147c74d8ce8c08248076. 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/QZFZ32483645.
Sad Flute (Original Soundtrack of Sauce algérienne II)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fef44c255a040cf6dd38de71d52b4a264a4f08c602f57aba1c0da01b1d574b6. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZDA52478457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc04b7216d86374b7db7f24d74c691e88044ed0bf4e5158b0acfe4c0979d768. 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/QZHNA2497673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3639595d1d8df7d6513b4d4a0ece811338186a1326a644a9e9d697e0c4d4e07. 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/QZHNB2400408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc695f3c5b351a8d6bb62e07acf76afc83fa17e54a28cf6527f54898ba79bf25. 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/QZHNB2400406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301271d0d4de27857d82f9e47f738ec762f00bdc39b2b08b66b04baaa6cf1650. 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/QZHNA2499158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424ab5b2b3624e3bafea1b047169e53a3624373d552e95478f167f18fb866c9f. 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/QZK6P2458701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde662e8a9e71cf9b42c3ef750bfc55312b3690b797e84dd8947730492f76f2c2. 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/QZK6P2458702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b914ac78b2c35631deb7c348ba6c9b2cc139d7f984995c6ecdd1c2130348325. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6P2458703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4b7e04eb7adfbc17caa4b26cee264ff7ad38eeac553ad4498a992617cca2b3. 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/QZRP42407350.