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 0x741b7cb975099b354a5f98ae3b62f02061d507b4f9f72e6db5421e9f9cf5774f. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a31891db-7fb5-415c-a926-c19b97e7996e.json and https://artists.proofprofile.net/proofs/artist/a31891db-7fb5-415c-a926-c19b97e7996e.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 0xd8b529f4e06f716a41e143c33d5c9fa04a31970b940313fc374437065b134920. 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/QZNWX2348909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7ffe4d320a9d152f15df6e3d8f2f8ac07226f4622aa379a8a5df3f3ed193b2. 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/QZDA82413796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c45ff75f688d05234ebcdf4b0c8f3408e6f9bbdf97d175026590d0526385fc. 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/QZRP42342646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368907cc6a48555ca4858374266e160cde708bb4529ae3f3fdd437a6d35baf2c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZRP42342644.
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 0x4c4b7739a042a9b7436b67f25c66c6fd7c637b049d29f7e094d07a9fc0c2ab5f. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZRP42342647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a320f4ae35a520d9145ba26c6be89b8c29dafc9f3cced06e97d10db3317cad2. 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/QZHNC2386248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23a2489b817ddbf5ab4c5086e5e7992ffbc67a92d0c385c0cda685d8e0af736. 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/QZHNC2386240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fc106fa6d5a001158c83bc1a0d72466ebe4116dcd77ebc4055249f04bed56f. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZTB72208381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4b9a6b4efc881c9f65aafe7e1213967d9e5c8f3ffda789bb68858fc753f30f. 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/QZTB72208383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117a64f3f0005faeb6fbc195dd0743cfb5471973131093aeb2c81d55c455aabd. 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/QZTB72208384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1ddda29b67da4773ca6e505a792da115534ba15f121cae81387c89fdd3aa5d. 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/QZTB72208387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f5ea7aa19e79687b75a22069f0cc6906560add68caaeb62fd6ab19e0c83b5b. 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/QZTB72208391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf678d2838e8e3326d87e9b56f1fdfbb3df2fc798db1d82f1de164508b18935. 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/QZTB72208392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6223266713bf7f960e8857eb8e0c3390b9df81bcacdc5f09bcdcaf375e176018. 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/QZTB72208393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e11a34239c9a0b0c92601543d2fd9ee93ee931b028209b5e4b513f2bcdd2eb. 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/QZTB72208385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dea076ac35ccfb5d294a87faeb4a2561b5455987c9a055a35b67682e30368ba. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZTB72208386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cdb462567067eaafdcb06b329e83d9fc96f1ede3df8139a78f5ecaa1d2fd74. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZTB72208390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4513591483e67587fcf509776d2c86a2f2ae510477199a7eb2d6414e8e3dbe2c. 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/QZK6L2137004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc08875be18b7c0496c24b06f5aec0f7c9854f7e048e2f9eb5ce2bec93efe67. 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/QZK6L2137005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f82d20148ced9667252cbd9a49d022a6e564108243bbe0f3bb928d7d796e823. 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/QZNWR2026943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bcdcf25504f12dc077d52a1cdd0b053f67714585daf378a47406c1421001f1. 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/QZNWR2026948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468b8a8f8ad3e86f6d0f1e3dac4e25535d93db5be0b6ab5aa2018b0286fbce83. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZNWR2026942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c167cbb87d85b31e28306fec823cbef9e34b9e22140aee5da9a5aba5a25f9a7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZNWR2026945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd967f639b09796ee92983f6a919b331a917c8fdc714c3820ba39c35d37ffe23. 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/QZTAZ2484019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737742b3785f3217a76c76d0633ed75b6ae3ef78b17b820298c44f483cf7d1ec. 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/QZTAZ2484024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8449de9e1362e7d6e5b0d64267734a237269718ee8b1373fc1ae502afa25174. 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/QZTAZ2484025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf36b24f53174f98a9c0a950e8689c07e4c93effe2fb55088a3150669b4d1988. 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/QZTAZ2484026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4620807f0b50eb6a73cbeb211d1c5f28be98f61f34372840a59e6a5bf52b2481. 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/QZTAZ2484028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38524f2c4f954acef5af79c63b59e59379ba0f70f10eeaa4e4568d71809d8f8. 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/QZTAZ2484032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb040e0c837a932ae149cc823d7b074909213a86bb9ad4753fdee6eb3d25495. 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/QZTAZ2484034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f11066f76b3c5cfc504200cfc6b7e0b44355af0d915f2c4d5581dac1a3706f. 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/QZTBC2336814.