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 0x5e76dbdf02ad6e3f3a3faee43a49c34ae20c1deb365db9d7b25b41ac88b6f5e4. 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/bc8355b4-29db-4cb8-a9d8-055a123ab8c5.json and https://artists.proofprofile.net/proofs/artist/bc8355b4-29db-4cb8-a9d8-055a123ab8c5.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 0x5840ee3879b624b175d28d82a8649c2256706effe3f58176bab2d1d89ae8ca67. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:57:42Z), 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/GX8LD2417356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c56cb40f7cc4b87cc5aaa8ed77ccd1d83b8794c73068595340950f850a9282. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/GX3HH2404686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e219600f282495d4088eba0f8aef06efbec923a29b0662be7190572b56d94d. 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/QZN882438499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9531bc66c863b57cb22b7695826c09db5d7d055a8676ab4acbb45d86334a281. 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/QZN882438500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ecdb3d29d9d31d832c6cefdd314282d25b8dd39a426f1c6a653df32057eab0. 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/QZN882438497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d390fae2a7a7da99c0fb82428edafa26917732cc442db01b36411e0d718f26. 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/QZN882438496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65ee44ff5d0abce1307f167d79e7a421bf0b0e8d957598f159de0e938c45f52. 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/QZN882438495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6678a7533a1e52f9db89a6780d0c0754f5d57e6aa73cdfe63c2b2f157f715f. 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/QZN882438498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99bf7af3f863d5679be3b621a75c1cc16250216901e90c99b28b0c8c0bdc67f. 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/QZN882438501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ac5b4b31664f8b039f4bb5729cc2815917fd12c0600c0311d2db4137a6278d. 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/QZN882438502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f78513d9f5f2b3a52dce9ad35f482500c773d56b9b2d1313db203e8a052e94. 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/QZN882558842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fba0145bea95a403d665a2d4bed8c2595eb0b57c99af572dbaed4ffa884cd55. 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/QZWDW2518839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166e6b95102ef7555c0ff7a5324b8a29a0bb009827466c6d3d7c0b33ecd369d2. 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/QZN882517254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da4327bb686ac8bfdfe8372ead5c2588a58bfccf5ce52a01d7ca441852dd865. 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/QZWDW2518836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56fcebbd5af191f31a56a2cc4f6278a5f318aa9226d11a932b160866f655f86. 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/QZWDW2518832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50314e59665fa3caa0f13097bd487f57cacc53f260a5e9d47057d0cae1387310. 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/QZWDW2518835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c45afec2fee2e71a9ba9bb07a9b45256ba77e7292710a18264c6cc504e3f6d2. 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/QZWDW2518830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4977cf604b81e805bd5fc8a9f423c046ee1274cb29129b62152879d97cdad399. 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/QZWDW2518840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3bf636d46c1ee34490f3f9c740df7fec9a637fb2065ffef4481ab0d0b872e1. 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/QZWDW2518841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21964a1975deccd8b3a2e719fa4591bd53ffc0ec294033ceddc629b7ca0898cf. 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/QZWDW2518829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692c0b7455a8162aac4ff140c995ca7f2042c2cac04adfde9a06cbf7b67522c0. 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/QZWDW2518831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d8d852f038fb96f5b0b6627be68e3d2ecfcc2f31e9e54e389d291a6f8ebd5d. 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/QZWDW2518837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290d3a2e4a40024c93c628eb05eb8c6e9c9172c908d9e62672dc895fb09d9cdf. 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/QZWDW2518833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca11a267cc41e4b6e6190cc2794db5c2eae724a4fdaa0bb954adf93164edb4a. 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/QZWDW2518838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fbfda9134bcde5b56fa02a13c198f29e6d0591b9dcca6b80f10da770c9c191. 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/QZWDW2518834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ebd20dd6bfc0fa33cb9fbb9b98ef4eb85276832219d4fe1ede910896d76a7a. 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/GBMA22443619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adf159fc622fefa27326ee88c638bdbe5161d694bfa7c794227d3224b9ca1c0. 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/QZ5FN2510008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e08fa07c6b1b79eb99894719d8517406c5e2753db3366744c416c590042888. 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/GX3HH2478905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9219484fac4fddd8eac78fca3c1aa976b84c885718d97e2f687c3716a526ae2e. 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/GX3HH2440531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a68e346f6484a6057fa68ab34bf487573372692ea129883dc9e0d6c06db5d7. 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/GX3HH2442653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74cf2e9ce3a49d67a1d172f217445e3689e5f05104287edf8431cc6f679be75. 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/GX3HH2448544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c58dd6b06d5a571c935d28588c0bbef4ca63490d1ebf2972a999997f6c1e598. 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/GX3HH2420629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c8040e8feb2995eba1dd15103a0463ff5652be3c29c341fc1bacb554cfa701. 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/GX3HH2455797.