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 0x74bef650ad0024f6c142948c0431a2161f4c8efa2e12c68e5e5a71114b5438fa. 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/8009ca7a-460a-44f0-9050-8835ba15b158.json and https://artists.proofprofile.net/proofs/artist/8009ca7a-460a-44f0-9050-8835ba15b158.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 0x2ecaee1e8c009808fc1dc59e0da116a0f961334da38a169e6895a5f10ed4e4ff. 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/QZHN71955167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67ee687c38748346eeab69b90ae4ecd0f3ddaadb7ce7951efcc5c4211a5229a. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZK6P1960846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d5c4beb3db4a38ff79371ac3d77b5b9a3ad1c435e08219b569d6a5ad0a7261. 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/QZK6P1960840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce6fe2a38d26505f0e8df7f1ef6fe15080deed9b587d2013fed66f612acdc72. 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/QZK6P1960841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67ee687c38748346eeab69b90ae4ecd0f3ddaadb7ce7951efcc5c4211a5229a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZK6P1960846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9bfcdf08da4bd732ef58ec1e3a215dd33e4d2e3ba75f829c6bbe25f89ef2d0. 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/QZK6J2056272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ecf538c2fe09262110e0b0e1dca7101477232cabc17649ebed9910faf939fd. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZDA42018876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe658e09edc3c4d6dab85761d38fe7f07dd41eec032ed3867cda6696661668fa7. 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/QZK6G2091305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a89179acd185a39a9bd4754dac8a093d3361880cd8265e91c5ed677e43769a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6G2091310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecbfee953a3aefc8aaa7a1ef74efeb814fd03ebe037f1daa4d53da20c38321e. 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/QZK6G2091311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2825f5053d4b39a3f2301f7edbc3d10674437a3cd22a7a86c906764e02c79894. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFYW2172416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0125f41ddd414588d3c6153887b430ff2a5abfd886f9f7d1c49d367027ece08. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:36:56Z), 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/QZN882220766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070682a14b5ef2de7630478837c86fe08dda4e3d7483f36dd231ff176257a01e. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/UKZGC2410291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f64bd4c8df7ac342a9a70a21ec1b4310a98f30fb76da403c4828a705a4aca36. 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/NL4YD2100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e395820191930a68d35d9e0f45f8eb54edeafa7465a3bf2c90acd07104311c. 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/GBLV62014425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022703c238f3243466160f167e5f06e9f43f23a0f674e24e3c49d634f32e8b16. 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/GBKQU2107947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97d5d85dc6ce0c920d3b83518b9e4273bada99112d93d25e5814702d45e007e. 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/GBKQU2107948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5156546d6a40758ccb9440665f626ae25674d22b439a424e4253e686dcaf0d74. 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/QM3DF2127388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5e4f0ef7373e4fd9c32c4c7b351a226ebcae1376c6124fcf02fd3ff6ff8013. 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/UKZGC2401393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33c9a83d65a3b6679355457cbbf19da5db2de2110081ee0a9065409b1634dfe. 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/UKZGC2401395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17509a769ce35d2403b0312adb116cdfd25393de3f02d0171cd4f5510eea557e. 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/TCAEZ2059090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95f9f80ee673e7e4f29fc91b0eaa910e76532ac0f9e4944234b16b21849904e. 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/UKZGC2303306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0687a05bfaffa4cb77564fc6dbf5e45ac9c75a1c52a168a624d1f3ef51db3973. 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/GBKQU2168452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a907a99adf8799dee4435ab0486b8fac4414ac94960b272fe3b6dc14dd3954. 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/US3DF2079289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657926b1920fb435609e066b1ff88c45e64e39c55442455804281de3b93909d3. 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/QZK6Q2471927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ad6ec1fedc4bedbeb53b7cff230609be7a77d8c253979063e0a1b83cee2470. 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/QZDA52087017.