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 0x445c4cd6045a344dcedd3a1df47e4b5f6ce35ddc2c1c938754036d517b9af818. 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/dac03c68-733e-41ef-99d2-84b335d995d9.json and https://artists.proofprofile.net/proofs/artist/dac03c68-733e-41ef-99d2-84b335d995d9.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 0x0d24fb79bf128ceba8429c85b1971913928eda02b4ccc10dbdf102d865ac765d. 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/NOAFC0800062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4102c457e8312df8bcc6c6306c164d909262a49c0a4003b06877b5a5d32fc67b. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:47:52Z), 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/NOAFC0800158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c9725865e218048f61c53121d66119f2188e4a2195c18f576b7cdf1c01aa1a. 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/NOAFC0800160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89475bc8b82ea62dcf189ba79f8ad46de4dbfa3eccc64369ebb7154a095fccc. 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/NO29P1401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5621dff41383fdaf8b3ddc3c71b3309d11259da23df3d53ac354475ad9dfef26. 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/NO29P1401040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083464737135b3c2269bd02f02e26e795b7eac6ffb5cc91f457874e7ee72e319. 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/NO29P1401070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae7138bfe8c4e47b10055da2d39c6a3f6c40777268aaa83db1742f912d691b8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NO29P1401080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2400da0b76374e4b8bc0798ca9be18e89a0bb4b3267244529e8128213b04113b. 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/NO29P1101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d7a79273dadc08b7b3fe2319fbecefe6d7035f07adb4184d7a59672770150b. 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/NOT9Q1601020.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab959638d25163cb6a821a7f2c6fb161cbc215ab40bb4a83f4f114a047c1c90. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/NOT9Q1601140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe754279aeb7b8849545a7d936c401e1c16877bc9189685f91df7eeab098d6ba6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:40:22Z), 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/NOT9Q1601150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4b20c22c416f60b1a19af54f19406eb9d38600f53c96b0e8f01e0e75c39d9e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NOT9Q1601170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaab15c349667ed9de600aaea0a106380411dacb645a287805deda7ff111ef25. 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/NOT9Q1601180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25844349d61cbe17ede49d05d0a07bb4fa7e02c9fe3423e5a456f4b5e6b193e3. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NOT9Q1601190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459c02daad6856a9793ab9d1b1e031bce80976e466a1c69838edab1ceb216aef. 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/NOT9Q1601200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01ffa493bf29bb5040bc8d73b4c45c0fb5e261d94885a5db4fd099f5a894401. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/NO9WH1901010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf389d88148ed0b757534d8b8fc80811dfe86933e19a0eb563e8033e3c05a795. 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/NO9WH2001010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be1144501943ad66ab8e9ab69ae4cb3a56c41eaba5219cf1e14ef6ceb46f325. 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/NO2C02201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9b95980ebc76ca3fb69966c5f8f1a403a9b1f8746751899291da56523dd32f. 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/NO9WH2401010.