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 0x7eae52cf12fd5312cc45da745fedf781b98367d8bc13f58bc144d67e18bd9827. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f74e0c9-555f-432e-827a-41dcab2944ce.json and https://artists.proofprofile.net/proofs/artist/6f74e0c9-555f-432e-827a-41dcab2944ce.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 0x23512abf571a448835d4dd97b6513d6b1f463ada278342968f60bfdaabd58c70. 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/USHM82039667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09929b8d98bc81c8561fa07ed43a2f7ae36803d6654e0f3dde4f0c60a7d9519. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USHM82039666.
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 0xea07e4991f7f38c38f88bb0e88ed3d58d7ac2d3ef04e30986675f8a5b7b5b865. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USHM82039670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62c8c5357b0adb064781a79954432812d317c96ebd7f07e8757002218f11681. 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/USL4Q1736443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8241799a77f0bc27a27efea876fbe0d3199cdc4c644aa940ba8a7ce91bfdfcc. 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/USL4Q1736445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85035c0df4510b1aecda01156e773a0499d86d89bdc0bc6d8c4eeb301997fb84. 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/USL4Q1736446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2069184771b2b21cd4687f1c915c36ae2d61cd5ea5c32774d42637360ed6861a. 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/USL4Q1736450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756cc90b403b3bff219f98bec393b01ba69ad4d2f07180c74230bff2809d1c7d. 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/USL4Q1736451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1d653abeba83b08c3e0abe589467a4f2fa24e188c8fa44d1df9e79addcb50b. 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/USL4Q1736453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10324ea9f6036aa1fe932e688f82e1a68b39a92086838d234f76d02acf1cf8b4. 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/USL4Q1736457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde87436ae7030f4881ab375a0531c3b55e991dc25a998092d4478f41e1741325. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USL4Q1736444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede36a4b077cbe217d25bf92c72c0a497a668b5cd0875ac4ae06849c24b46ae1. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USL4Q1736447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb82568e238949ce9b13ae2024df966bf0301be0c6cd0a48662f0c8140267058. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USL4Q1736452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628ec29815bd25e47b66e56b73800fb64b87dd1e39147c0bf00bffa6a9952da3. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USL4Q1736454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d357b33ca2132698f4fc0b778c7d5a94fe4511d30e27b11ace54fb87af3a6e. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/USL4Q1736455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995bb9767dd98d6470a06d68de91710f4d220c47843082ad0fd5f8ed4ff79b75. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USL4Q1736458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0615f9ace8012ff42a5594da20d46e22008a60e2608bcfaaf37a1aae597cd5d0. 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/USHM81735781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dab029b9ea4a256ed9e01b64b1ff20de21bcfa5da4cf496f78fb3c92f35008. 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/USHM81735782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6c86746619aee92aca72fe862c019864ebb75b4ec96220429372d1aeacd360. 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/USHM81735784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bef2bf7b4da374cf0f0c68c983bd0d755adebf1d5055fbc91534bbbecffc86. 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/USHM81735785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fcc2975d68b5ba58a006d8532cd02a28b9f9a2238f55709c515634e77abb35. 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/USHM81735786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1953c42572b36c00d4b8b1769c9a968767def6b8843b2d161f628d21b231c11. 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/USHM81735787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46ffbbad917e533dfeb631a51af938715095eedbca3d05e24d14dc9379c7f55. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USHM81735788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3a54f1e6bcf723b2c6c2e0ab00d7cfbf0d029449e2470493893ca4d1231cfe. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USHM81735780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeac19dd19ed447f95c8366373ef615b8b86502ce2c126ae758ffc262d363828. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/USHM81735783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade83bed7b643b2594f69d726d7127fc57972037dbeb5021a473f650cdaac6e2. 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/USHM81756383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea050aae45df2af20db6877a189e7f667ccb8641030bbbb7f4cec9bfe983553. 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/USHM81753125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7052ab96ee60967d6e65e5afeab507ffe4d43959d1d1baf0b22598a70cb03362. 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/SMRUS0022188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0384783008b96ef850adb864c0c3b24f963bb130b465e6cb4121a66f924395d5. 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/USHM81735792.