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 0x330ff5fe2c010a8a164fd04f1eff633b05252a2a755d4999c5a3a7eb99fd9f47. 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/401109cb-6184-4f66-b702-910ec040f6c1.json and https://artists.proofprofile.net/proofs/artist/401109cb-6184-4f66-b702-910ec040f6c1.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 0xb94761b21e29def24d01d733d267f2239a94410bb3c10f074b9696ad250651ce. 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/CAGLX2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4112c512e86129277fa838eb6ad483348de620ab3178a4621d4a02396e034b0. 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/CAGLX2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b15d9ef6c959424dfa3bab459e2b45d6b1b10a79c2fc74c38b938a48a2af75c. 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/CAGLX2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021895e86fa896d43528ed1d2d959f23c2fb5ad2a16fd6dab28cbe559cec8397. 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/CAGLX2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83405b7875c15fd89f7bbc6970c6efc86d65e93c68744defe28b695580550f82. 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/DEVF11900560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaf020fc3a4d1184b1633fdef9d611ab077d9377ca0f84f52ee87a8aa7368e1. 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/DEVF12000656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c77c715287deb650079c70bc5f57bfacd4dae845eb73dca87d9d078ec637d5. 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/DEVF12000661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c887c4a28ef33e3b39b40fc23f11ee4ed897e6fe9462c88486ba1e0cdc8a66f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEVF12000662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622aa8a820dddb31bf9ae477ee7a2859cb493e18c1a97df8c3a20cf7789c4016. 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/DEVF12000663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfac1839a093e05c2ee6b606acc8906df149cd8f4fb831bb4de19eed1fc751cf. 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/DEVF12000664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255aa7f6b7a5b62613b1a8228fe0dc0dd2905858f44f3b66c572677b96ee2983. 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/DEVF12000665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6f39308ebd201734792ffc0d33c5d64731cbaa9940bfd2d24f7ebcba4e5cc3. 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/UKY3K2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2f749306cd679b3a926419c7c05b76bb9eafe5e187f48a6df55ffef990ccb5. 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/UKY3K2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c77c715287deb650079c70bc5f57bfacd4dae845eb73dca87d9d078ec637d5. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DEVF12000661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaf020fc3a4d1184b1633fdef9d611ab077d9377ca0f84f52ee87a8aa7368e1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEVF12000656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83405b7875c15fd89f7bbc6970c6efc86d65e93c68744defe28b695580550f82. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEVF11900560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954967821736a4af97d9a331aba73de594fcb1d9bb9e57edde7919d8910520b6. 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/DEVF11800375.