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 0xe7936e719d66ea72b340aaf438794d3f4bb4bcfbd7b1d80afa0690b6459a0506. 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/cc860a9c-1d34-4ccc-9ce9-164c1ecc87cd.json and https://artists.proofprofile.net/proofs/artist/cc860a9c-1d34-4ccc-9ce9-164c1ecc87cd.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 0x1a562a9e6169e4848462411683d623fa848adc77455f735862ac2ad1561cb759. 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/USA2P2034443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505fc159656e9d162849ccd1df7a78ba188d0559a56864e3be2c09359e1a85cb. 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/USA2P2034444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d550e6f10b304d80bd347a1456ec0d774a3e34d1d19ff977f1413dbe3feb89. 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/USA2P2034445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290eff8bef71248e88ebfd54c6a49ab3b59eeb11feaa5c63dcae83d12d65f28d. 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/USA2P2034446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17297b52dc085182b2f267fde2ff2c25acfb05bd93d26b72963f203b8077538. 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/USA2P2034447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684fcd9c4988e307f98c83a51fa730a22bf2bec663334ac59bf1e1020ef5838b. 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/USA2P2034448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13ba3ddfe6df298696423d4f62a75c885453e8cfb8b6db561538605686caa21. 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/USA2P2034449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95052f4619f4900c30c3b65e5de4085b4022bbd710e2767aef432166c6b9f09a. 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/USA2P2034450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaee89b14c2f7c227d9903a2b27334115a7307d10242eb3590aa845235b7905. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:48:26Z), 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/QZNMX2453686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031411faec8207ac2c28e059e81a68c1fd5c3cf344507d2ae5e79aa0b6fc36bf. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZNMX2440153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1eff4149aa3d7da50cc72e7a382406317508d8868474787777a9956cab2e2ed. 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/QZNMY2422368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58308b375b14b1d6a30f2e33a0c94b72883b0e6a9fcf3a35b763d5c76890fe1d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:38:03Z), 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/QZNMY2437211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac54ed28e458916884fba7dd7ed4e6dfaaabc96bfd979dfad3eaa1aeb977613. 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/QZNMY2434945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149a584722069d2a0ef146bde92bbc83031fe7fe4ca65028b9b426669928b1e7. 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/QZJG52566499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d589bfc6e2d0101ba4ac5b9227ecc6df49ebb19c866291cbb02fe3936b5d388. 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/QZMEV2583204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa966db64fca395a67ff3e604425e3144f51803f6fc42ba8555b16580c8020c37. 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/QZMEV2589717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62ecca19bb1c0a5b413cd090ae7fa2202c5ff70462b66146895e023bcdb2a6a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMWW2542618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b1e9557f355ac44770a2b2250219fbc8a244c4a49da09d924a05b6564dbadd. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNB82584715.