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 0x1bda1805f787a361d10b7b29b6e0caf178af801df31ad266483c10e8e0ae94fb. 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/286d658e-5562-462a-8c20-22d8b0e7928c.json and https://artists.proofprofile.net/proofs/artist/286d658e-5562-462a-8c20-22d8b0e7928c.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 0xd7ba45a67d09a2a1f8e8b78ef48b20c50005066a26ac43e6a75d677f810646bd. 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/DEQ022009011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43e12c44656c51b5be54f2f914d0a4a3616ab08d85a57ca96397e68b4df5c40. 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/DEQ022003644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467adc3d43544f1733153a2651d366d013b48c5d2c8088c6fdde6bed01206068. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZMEQ2002972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aff7628260708133fe470721fd8d893e6725c133adfeeeb5b9a55360d7f83b9. 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/US3DF2234353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e80e307a2b81f7971e3a7eb9307a0b2193a3f0000f2c1a8d906257ccff0df7f. 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/US3DF2240094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ddf6c24b402991b5a25ad6e67221bf09a607b12f3ed5e006d48f750676bab4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US3DF2251322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265e2a9f301580ed7cd0100d31c6431c54e03c132b427a0d3a7d86b571e3ee28. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM6N22209361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2bb1a42b7f5f0fd6fc3b32551f3e4d5fd749c91e18f130ffab9a601632fef9. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM6N22209362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f9484aa0745f12c7368dc57efba43504e1fc4ddb80ef6ec45552590eabdf78. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QM6N22209363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f3d499837d1a816be8097438a39aefdc0d1e6ed66a6ec3ad2e8d2b8ca687ea. 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/USANG2246198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262d398c87749d3e06eb9968a378ed9ed9b028d932d56bc07be29c91182234ae. 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/FR9Z62300377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0329a169afda15bd7431c48224348d8100f36e7d598644dc3cf59e5b05a495b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:49:25Z), 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/QMANG2232913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea9adf1aa252b69650e0bec3f573501f8b16eac152d46f428edc7502d7cba3a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:45:07Z), 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/FRX762439749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf5a39c46c5c7bab9e8cda4df0dcb1d2e4dcea36234d0b954d501d035ce4886. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR9Z62400731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca174d4cedc6875527e47063f28731c097cd5141571b36a1722f049e857828c1. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DGA0S2444557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb93d6c97e48e6753aba26e86696b8fe6d0bc682538e9f653b35b8545f6b673. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR9Z62500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5104371a908f7e7c26cee039db4420f032d08b5fa7cab9b797bb0f1c2b64f5. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/FR9Z62500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d4aff8fe0de3fa1b3d16891f1b409123bdbd7ba7aa69ecbdaaa8ef2d6acac5. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/FR9Z62500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d993bc7c76c6a6993016c181293ba47e51c79458178c5376b1a9105ea2f2880. 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/US3DF2550379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0a2cb09c24735b9f7c29261422c3baff7f6c6e198d95598a037f6e20765d84. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US3DF2570159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1324a86fd139892f2c8aa9f8e56413d79cef747359361d99d9416f4112ce1ba. 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/FR59R2478982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e041c8f6271f14d7cc843ce4b01db62f4bdffdc796de411b55a32438763abe2. 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/UKZGC2406298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde98f693727c9fe3141ee684f73db969af10f9550173b56c709efe803ad4c43. 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/BCD4N2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1b4ceef538a3fd2e0623ddaaebe6af037added0d06080cea897dcdbcc11a5e. 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/GBKQU2286541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865cc469e39bb8a70ddc2f2e9abebae053817a458ba024d8abb0a0da9a17862e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:03:26Z), 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/US3DF2241330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1e3e2a377d827deddd0d38fb89fd8f0e046f53ea4849e82e8bcdde451832d3. 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/US3DF2534313.