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 0xcf98583ef6a071f97f6bb4dda9a23a9221b40345750ed0ac17a8c06e2ccf4acc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b4a5d15-b415-4b64-9331-e73da044d7f2.json and https://artists.proofprofile.net/proofs/artist/6b4a5d15-b415-4b64-9331-e73da044d7f2.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 0xe934cca453fa457184d1b986807964f4d598378f74305cde0c63ea8f84c2d7cc. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:54:48Z), 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/QZNWS2214727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec640bf11f442285c56e9e0107904cb23b029029a3dda23c36fefc88a4360305. 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/QZNWT2218969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa9d9aaf3ba7f4df28939465be79e1cc6f80da38bde348bd7c070d3e8fd8c49. 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/QZNWX2203715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e54418e56dede83fbdd78f22ce6acb4b3c6c06b33c45e254535e631b796fc95. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZTAT2280183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36561b9f363befe346367adb6d3d6cbe1be28091092bfcce31f48400d942948. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:57:36Z), 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/QZTB32206254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490c7669146fb64a3df79bcd6b446110f7f96c749c9ac7fcc224cf3b9735fc48. 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/QZTB92235605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a44cff40b0df74955b7ce4cc15b1196c265f7881c17e9ffcff83aea37c72283. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZMEQ2345011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad03866daa1ff179103b2e4425d96660afc60daf94911449804419c5e1322303. 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/QZYHM2329170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62fcb5cfafcbb85d2d757c6a6ced1efb3688c6656485907b6ea0ad5effb2ff6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZYHM2374332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54975cf99d4ed993ea7de8f7497b8ef5ae035b19e62e21540b1d92ddd0225d02. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZYHM2429066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b18ff15b2f982918af15d74ab71fa632b33923267a1b79609f05cbf6408663. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZYHM2408251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fea06737fbbfa6f6202923053ddfeccf13d3b42ee9b99b2e56e933001b387c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZPLS2415134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4aecf3de62b3d1c19d50dbd6e1fd0b54c2ae1e63d03b8624f59b7521736f5d. 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/QZZ4J2401499.
Sukuna vs. Feiticeiros: Ciclo Amaldiçoado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152c7e2ee91538f072746028a511503f89ec04530fae8282167c12f2fab03062. 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/QZYHM2426256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546d18a6cd14745105047cd30a5d823b565dc88280d70c8a2bba77e14dbcd7d2. 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/QZYHM2358177.