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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82db2adfae970d096fa7e86096f32c66e36771d551d66125617c7f2d2b212d53. 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/caa489f0-7b22-4a7a-b08e-c0d39040a56d.json and https://artists.proofprofile.net/proofs/artist/caa489f0-7b22-4a7a-b08e-c0d39040a56d.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaa5cbd8c3e7521aeb67a2291bc6a387cb14928fa0fb6fdf0e8ded9bed0c895. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ITT370900176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc342241e8116f67881d714bba5a7baaa19199eb191ed5d4026a437f0a84f0538. 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/ITT370900422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9e509c39f903f1262a896378c345745355517a86370495f63494dc4818f3c2. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ITT370900423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1226598a905247d26a1cdba9b8d4de642a9d830df4aae6062998c720063369ba. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/ITT371600534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4d82bf2ceb8838455aed95662e394ec9e0ccdca28569d4b3d6bac6212a912b. 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/ITT371600541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c50d290332882c15321b2032778005e17c66916fce35dcce73917de94ea16fd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITT371600544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fb08ee59851f8f3f39aaa49accf580c80f9cc6bb0950bddfc4804491837f74. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITT371600551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fa095429dc15e80a19494669a6f29b8f721e6dc5048b2922087ea1971a5863. 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/ITT371700711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc02a8f3a27f8454b2276134d5b62360e6fc79ff4d1ea369926d9c2998131306. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ITT371700714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff7df18bd7214c66310c9a72aaef62c8fa6465ed2558997d92aa2a248cf61a0. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ITH501991007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa621dc6a8cdec04f5a2103aa08510e1258d269d47063fc88abe0847e5c8690ae. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ITH501991008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f3121a85b4c0b879f40686106088d95bd9c981e1966767f5fb02338179ca8f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ITH502014005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e33c9117c2fb1badde7e3577436100560ce449f0c1c9617ed7ce3545a556c2. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ITH502014003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139cefac235f7f4ca97ecc565bd1b2dcda7fe8ff5f76cd11a2cdd5ba20f05110. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ITT372300106.
Le Mirabolanti Avventure di Cecco e Cipo su Plutone
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492338bb4923bca3cd0727160f14b8f42cec9479222ecdfe8985e321feffdecf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ITVQF2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fddb3ac44a027e0c155841676eed4dcd62e717b7edc39a32bf635ccf9ce8fb. 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/ITVQF2400051.
Le Mirabilanti Avventure di Cecco e Cipo in Reazioni e Relazioni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e03299253aab4f03e0db9a9d0c4b104f9a40b3dfa510b12c3391ba3d44a8185. 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/ITVQF2500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0761f3bf318afac3cbfe4ade46660ca47fcc11c1585fde2917d4c1408f642b2. 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/ITVQF2500053.
Le Mirabilianti Avventure di Cecco e Cipo in L'amore su Una Panchina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c8fa3e482eaf7755cc9df78dbffdf5b6e3f5ed64b547e5d2472ad53d5d0556. 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/ITVQF2500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572966a61d54a4254a2f202b1ddd1ccdbdee938684cd4d827063fa2fa1bc753d. 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/ITVQF2500055.