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 0x4bffbf366c7be852f13e54a2c03007179532ddecb90dac71d6304f00fddc4c7f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3dafdbef-c0e4-4e81-8b8b-6e6fc62e6ebd.json and https://artists.proofprofile.net/proofs/artist/3dafdbef-c0e4-4e81-8b8b-6e6fc62e6ebd.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 0x49e2a3c1ad0d003bde0da247d2835894dcc4157b56b5c45e064cdf51a0ec424b. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:42:29Z), 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/QZTAW2260304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b23267cb23644cac4f6b48d5d8103562c7f864f8e5cf85b8c2cc07423d12ad. 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/QZTAW2260306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d55e2f614fa9bfcd5f38405f68bc3891202c2abf9c9cc993d8685a59d5887d. 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/QZTAW2260309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c7ae82bce00ebebf68df7ec4a2bf98e5ffb6f7f0fa83f2c4b0b2cf8c96361d. 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/QZK6Q2323718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9f0ffabf7d70f81153d8b8d74de35d803ad292741f94db23224dda2be6894e. 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/QZK6Q2323721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671511b3c88dcf3d8241876e7cb0a9d77b60eb1901f9857918a4a4041965c5ae. 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/QZFZ62442867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cd0a12d995c07597dc2074eececcafffc439af54c967ccbd5402c596681203. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZFZ62442870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd82ee25008b9f29c85e70092a49c2c6b26c8de1c8124450306048c188174dd. 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/QZFZ62442871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b25548a84f9242ce50842f2c18656f0e4714a033d69f3e8a731c942d1810da5. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:30:30Z), 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/QZFZ62442872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2350946f42ee6dbbd2ec773337d6e0b101261ca6b89962d970cf43fdc8d6047. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:11:55Z), 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/QZFZ62442873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94357d261a9f80325df8f7b26e502d5cfa065693b5191b6585dd27fa91ff232. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZDA82464740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09957085beaa28fa7cb22248ad4a788de4494977ee92a647bb262f5cfbac931. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZTB52425194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dec3c135a731107df374ef36f8bab6a1bcafd18456d338f891d5cab377c585. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB52425198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02243f966776e727e220aeca96bcf2887832a89ed95209014c5feae749289002. 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/QZWFR2425960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc7ae8b8b4922848462c8b9d896b474f0c2c3715349563d0258b23fe04e2ca4. 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/QT3F42434129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c95932bff0ff8cef2a7a9a339d9d90ff5aee53f66aba38c65bf4c7779e076f6. 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/QT3F42434133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34effdba48df32b9d6a1aeb80c26e8275e1d958372ceb4b19e5a436f3cef2270. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:56:12Z), 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/QT3F42434134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab105a15b9bc8433760f1cb5aba3df32d618a20150b6fecbc5df96953e24a92. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:15:32Z), 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/QT3F42434135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864e3416b169989e35d60facf1fc3b65813bc75b484765c9b3cc1a4b9d2d119a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:02:59Z), 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/QT3F42434136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a340f1925231f118f38d02eb085f57c095e9ba36630285a68d0ff8f1ffae9cb. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ762518397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8cc97bc67c226a135bbf7a510fcfab3b5e112992cfd2223ec416dbc37d9638. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ762518402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf241a505d08c5fac714092503e54c337e792d0d20bce9f15f542f13d99694f2. 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/QZZ762518404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420734a14b45545dc371a20a80e784ea9e49d756dee8fc43c026f6880e3db03d. 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/QZZ762518405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88e1d3afbdcd1d4d551efcf3f766b7bd47742f163d6f89f24f2752e15f16d93. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:30:35Z), 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/QZZ762518406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd9d82bc5174ccbbb196ca358d2b6ac1f18c9e3b80246b02e9ba5b9496326ad. 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/QZZ762518407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf7221aed08f9484053bff07ed09bd720680c27cdb9faeec204565b10b4ad7a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZZ762518408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447c7309f4ea9ec4b93bfdb059fa8a8767c70772c9fbf1177beb6631c5be9291. 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/QZZ762518409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32500657e30e3f306cb88114ac71210b34f5bcce974ea3e280420f81dc044128. 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/QZZ762518410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764b6fdb58558c9d72c47e42115825bcb5f3ef2f1e23b2021846f6b1e90ed79c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ762518411.