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 0xb004afce79a8c88797f377b68aec78e2230b336756801c7befbba831ce450256. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/267369f3-5399-4647-ac36-68ff38ad7e35.json and https://artists.proofprofile.net/proofs/artist/267369f3-5399-4647-ac36-68ff38ad7e35.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 0x9deb248f2508fd6dfa6c73384d764663b9ccf477983075799f0ed5a42e4d972f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/RSA221600642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d5eb9a5849cb34977e34abb8b6da889eabca5bebd671b24b2f7608d351a3e6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/RSA221600643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e74cad327b94e001ad7b9fc132e254573614b81af8c76fb38363224acc358aa. 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/RSA221600645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a80f64fbebf046ceefd7a7bd36235954ff014b37fa8763e8770b7f5f8a505d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/RSA221600646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf395d33ba6fd8503be29c427fd982684e840e08ade4df525a55f89c74537767c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/RSA221600647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f3f8bb00d8db784d991e8658c32ece26e8ee0d327083584834622298db8a6a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/RSA221600650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9998899648251e73232eb928efbb194d858d344daa5ec4cdcd8bb6c025c78a30. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/RSA221600639.
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 0x34f4106adcaa970e05757fcbea2b7e35aa58b5dac342153ffa2dbe0664283063. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/RSA221600644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1779183e4adb688d095afbe448a0bcdc287b4328f8d41da931255432e7a245. 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/RSA222091091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8193dab8cf359042bdb5f7e6f8f64575f43fed36059f407d771579b8194a413e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/RSA221600517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5945ad7d2b68b0e47564a79879ab32999f2eed052ac33f6fa19620587b0d94ea. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/RSA221600518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a397d22767a3a8be73179072c8fa752e91c046cdfda2043c895e907020dd98. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:03:55Z), 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/RSA221600519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951b71f2f6a99116120bdfc132253a75d78e642b6dfe8803e37eaf1d66fa2cf4. 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/RSA221600520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e47814cf82fa68ac64cdd098fb063bcf6e9f6f67007d0cb16cf3d18f25b0cc. 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/RSA221600522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6de27484aeb1e5501188ada2d76194c92f2a114bcc03a59ae05d433832175d. 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/RSA221600523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a48c3a56cb7c28b1cf04b3a291cbd4ed573b13ba16a35c0972d9f6d0ebc4f8. 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/RSA221600525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf932de74775816cc1ca97eb9528eda886881ae6b1c31f6092d8dcc2b9b6586ff. 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/RSA221600527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53db349990a7675f6d8c3eb34b45e27e72e3b90ea18ae09ac93dfba41eade59. 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/RSA221600529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4952c8808d7d4925f3298d2b2a264972965b2430975d4d8414cffcb2753cb2b2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/RSA221600497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacc2129a8c8c77599c18c156c5f67b29b0a17472e2c903bed491dd1cf84dab6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/RSA221600499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d9c455f30d86c2d9973279629ecb27de803bb5c325dedc130d5bec09122147. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/RSA221600503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505b8776163151b109c66cf2b452250f5a510f13d64c757e15c3fc10c75fe7f0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/RSA221600506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e69f5d4aaf39d70380f62b26d30e0dfc3a1128bd5e2a6178286eef2a27f7fcb. 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/RSA221600651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f9da503fb62964f39db00ecdcf833c291956c05681839ebd9ddbde97cb1f5a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/RSA221601854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8bd0e4a2d5626f6c06e685f3503e74a5bd95e235424cb4b35077fd244a3482. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/RSA221600484.