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 0xbc65e94a76c696a014eee463f20350ee887ae559f901bf4135408c6f78894223. 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/0a51a929-3e30-4f73-ba63-c3c17e638c04.json and https://artists.proofprofile.net/proofs/artist/0a51a929-3e30-4f73-ba63-c3c17e638c04.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 0xa7b68622a60e7067af9d41ee0c15a94009a8f41f97366a9ce66763d25cc68b2a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLL971400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef6e691c6dade46135303d2bf7d3934140bf88690c581caac6747f1cf853bb3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLL971400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d538a24dde6c6df6955dceef3dfca1cf5a9d638f98dfdbc2935a4d9f65e216. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLL971400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a014f9f57de556407fd48014050633966480ab641238c95389dd898be5b871. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/PLL971400097.
Adoracja Krzyża. Hagios, Sanctus, Święty Boże
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420e50615c732a8d056f27d7757a0f8add0026c672b52a0d3211bc66be819d57. 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/PLL971400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc515a4da5e7b32eeea6bbe901adb1cf6530eebd237c75f5f33ea4f2e6f6316ed. Chain 2 (Bitcoin): anchored in block 957830 (2026-07-13T09:15:55Z), 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/PLL971400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0237d40694236350e22e80956446bd3576838db4f735aac1e27ff83f81af7048. 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/PLL971400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca69e5be293228d72ae1d12935252f3fa446333dfc21db288b8a2206ca194d7. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/PLL971400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33ab27c7af064501d4d7cea4b5ecf485dd5d661d1ace154e60e847f21835f9f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/PLL971400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fcfd464fa3063636341c6cec3caa276c8ea258f5425ccc5b1e99ea428ea678. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/PLL971400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02288921ccb953edb1cea66b3f858f5336d3c7d903f6924d66d8ed68bf15db8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLL971400144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea300716764b543062b30c721e24c09db3955ff2c5cf0e19126a55fb74697716. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/PLL971400153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721a4c6ed57d60b3189bbfedf7ecbe08e93e404baa1d03c720a042a5a05752f5. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/PLL971400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c40b38cbf7272f668972bb376d86040b097fb882e259fa33b91803e13117db8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PLL971400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf586805c92de559334f923c6847b7cf8ffde9b06e280a28d51aec13e4a42fae8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PLL971400161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068b3340c9cc1a6c77a38b92bc328460f272faf52dd744b900df05a7f3ed50e1. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/PLL971400164.