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 0x239f1c5328fca6155595e4c742a6d2267bd67f16ea8339f652683e56d261413e. 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/c53ca06c-b475-4318-9bb6-8ccc0ef02f3b.json and https://artists.proofprofile.net/proofs/artist/c53ca06c-b475-4318-9bb6-8ccc0ef02f3b.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 0x211fef06ba1cb6a8a5cff6f29b800dfb6127a41af7c93cd7574173323a0d9933. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/FR2EI2101570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf700d4d4586e286f326457d5a00f3ed43e9952699c1bc24fe3ef0b1b598b9d9e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR2EI2101630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fc196053392cdec796510327f0fec6b0359f4af5ceb335f309151995c87f2d. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/FR2EI2101640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac2ae95be8cc50642aedf1f16bc4ac310d3228bc77b94a98c207c0bc7c900bd. 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/FR2EI2101670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9eb6976969ddacb59fc2602b4379717518b217a7f741ff055ef82411e9f058f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FR2EI2101690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2358a40a0d53c2530130f5574f2b3e59d553ee9de355de864a4b6983f1ee7be1. 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/FR2EI2101740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57792f112db500048b450767ea2ead1a03032f9e23800169d6c62e220c2fb066. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:16Z), 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/FR2EI2101750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211fef06ba1cb6a8a5cff6f29b800dfb6127a41af7c93cd7574173323a0d9933. 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/FR2EI2101570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6088645eb4a38d97c532fc7840d2f090527812197531f5dfaab1ba1165db13. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR2EI2101580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059cfab3d8c935cb0db313193ee1e44e062482b722294232bd2e1ad22b4637cf. 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/FR2EI2101610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fc196053392cdec796510327f0fec6b0359f4af5ceb335f309151995c87f2d. 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/FR2EI2101640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071a1db4898b4ebc8a860a284ad33806b96741081a06a089bf7aed4c7808863a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:46:17Z), 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/FR2EI2101650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac2ae95be8cc50642aedf1f16bc4ac310d3228bc77b94a98c207c0bc7c900bd. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR2EI2101670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcfa6ef85ac394f2e87723a7ec86c689bf6b110d21a5eb66896684a71b8c00d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR2EI2101700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132373a2f6d4b8f72a53744d4ee63c67f1248dbdd29e6a50d9f292a683222732. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FR2EI2101710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764f99a61749c67cff830188d726ddb453f6ab9ae05140ec0d25503c7c532074. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/FR2EI2101720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3a7b21b9331cad93f72e7aa9986577e9b2152a0d4260a1e06c601034745aef. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR2EI2101730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2358a40a0d53c2530130f5574f2b3e59d553ee9de355de864a4b6983f1ee7be1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR2EI2101740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22090f56841917d74a019099a256c2921feb0bea7c09f93922595a58368264b2. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/TCAFX2173400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc4081a1727e2d2de3ed5816d845564ecc87d753c5aa5b4e2ff4b4647999845. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TCAFX2173409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8829320ee9652e82bd34c1cdb2cab1fb72ab1d149d31898ebb8f9e7628e9c905. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAFX2173425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d93ce230373acf8f53d042fc0aaa277d4f59ca2082272d84a42fbaf45720d0. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAFX2173551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4edba89a9fb9c014ed98d8bc9ef28cf2b4fe7aaf073c1d1cddcd4ff03d22c13. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAFX2180568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccbbd2699d9fdf6c9c5dc1c180f25ae11482c7487c637a4dad17f307028dc7d. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCAFX2180572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4d8792880cde43088333a53632752fbefb193ef930366d03b69826414fd6ae. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCAFX2180580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa643baf6f679d093906d0d1442a8cf50cfe19225e31f141f9e5029685b985def. 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/TCAFX2180594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93038930d6f0eab3818f7baaf30afbcc7b4a8f35b34fd4d01f53d88192a2ad42. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/TCAFX2180614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ccc9f98c7ff791c2b024b65c9faf14705ce59047ea3e8db7329ffba6bb3a57. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:37:11Z), 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/FR2EI2302740.