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 0x88e76ee6e708d8144ebb9f8c51053ce9a7f1cb6ce5cb13b78a8b190b939f6c8a. 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/e199fbf2-7b9a-4146-82b9-9ff015ef764a.json and https://artists.proofprofile.net/proofs/artist/e199fbf2-7b9a-4146-82b9-9ff015ef764a.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 0x1a83adedb1d427d22cf8f1108b0cdf43b115455c77877b12793a377c313d9f2b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHNB2206608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d184746f0d036cf2e20df8af9ea0d5f2978b492942a3ec136424290242229ff. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHZ62038822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672ee170630859babf6f0ff85ac428b6d496be718c6b417bff6a4001da8e6ba1. 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/SE6QE2037999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52432fae7d8bdb144ea337814ea9fa108eab069c960f6dd1add025682c050fce. 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/QZNJV2084754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cd519db815fda4eba82e04fa434fc138206bdc296a3c54fdc2d08e5af678c2. 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/SE6QE2072929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d05f384acb1c42ee839bcac80118a6a6fdc9bf5883c6efae056759756e6d80. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/SE6QE2072036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e459640489a1bbf4465a49e08abea977dad8b429838d6db78b416cd87bea715. 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/QZNJX2131342.
Notas de un Cumpleañero Triste (Special Version)
Notas de un Cumpleañero Triste - Special Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214cb22d129ef9496dec90b094dbe23c42c93956638e1055a18706e02d42f0b2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJV2280821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa817211cdd03cd1879e7d007ab5759885f7fee1595175ef27be5a494a98ea370. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/US7VG2180194.
Batallas en el Desierto - Special Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2b3b52e9884d93ac9ce0ab8ac760820b965eba07f6ae66899bbaa53afbdf62. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZHZ32117463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d21c393c28be31a12654c7fe8e0950b980002b6d60354ca6b778f264b7cbc97. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZHZ32117464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5666fd15497f8043b61ebe5b5c5927d914933f8fa25c03d051fa81e5dc00d1db. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZHZ32117465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2525b137022b56808fcb79db9b96342a7ffc067a472ad96f23e9d61282333f2b. 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/QZHZ32117466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a46266fdcaf9640d286324409d6cc3ba7eb3e669a50d8e4fcff09f65e5ae7a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMZ92183761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab427bb2e1cdba6cdf27c6d7350f6176fd0ea48408cf48cc08fefbee03ce74f7. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNJX2103914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12138b20be81199c22650ba7dce6a4e06ee512100a989b211de31bf8d8245b6. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZNJX2119448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37705f80a080bc0123af02be8625027e0d80fbb8f1a146d6b3697aa6adcb72f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZNJX2196781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf181185c46604a9b591a9134ca81d447d3a9953431166bf5f420618f5e7d72b3. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNJY2148740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880c6f4bd83d8b8265aef31eb99e807408dae48dcfc80f169c149ef4098fa15c. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZNJY2167650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bf23aaec6847af05baa922fbc3cb285ac629c64ff3ac2a868978886d7adfc1. 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/QZNJY2167651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30abcc76424fed8cabf996201779da03da0b403209768b51944445718dc72ee3. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZNJY2167652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0497f14fc816c7bdca81abfd2fc5eeb2145a6180f93c9790d7053240076989a7. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZNJY2167654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28c29799ea1e9e7b108318c5006d5142bf30a56f78fa8eb6f1e29c47cacc3ab. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNJY2167653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805f8fafa6b3adf62f58b2dab91f2f1a6458765b6f80c8da61d0df9317b100f9. 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/SE6QE2062536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b327c8d34c7df39191af93acef5529afeed909cae6bac558a1e1fe9141e7e6. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QZNJY2167655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3398729f15a863aa7e54be678df9fae0debdf6a42f8af46ad44ee1b5e8565b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNJZ2116612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2134efa5d56a408f241dd957c0b825211d65f1e8a7f69c03b38298f67f34e78e. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZNJZ2116613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104d21b8f428525f2a85f7c8a40d698ab2dc3a8f2ae348594201a5568817e59e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHNB2204056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ba05eb1d4ab50ce3a1925d6720a588013e15b593e5c814199f9c01ebeace6c. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZHN32219616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0253329491a47b578bacf3d59e6f5fc32bbf25da918c0ed141673827146c5acd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHZ42260253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d44fe24e53d17f607796a5e2524c1f65ce37d53bdae606c0f2861596a043522. 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/QZHZ42272442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb52d8fdae0ac98562bf6a1aa94e52c8528e86c9cb0358d12d08f588bd0d77d4. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZHZ42283734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4f96d48288d292ea7e3a027ec567d942c714e7cb392f25db4db91a4790c869. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZTVM2290945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15884a1414c7bd52d0a37fec6498495170b9ccaa6e9885efd1419fe1834559e0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJZ2317169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2670dabc7181138ca51918953feb702ec14bbfc51ab17c5b2bc307ed19be8852. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZW9L2353516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b963b7c51130174e9c4fc9c15fb4e82d7151777d996ff301ff269a37a2b7b85. 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/GXBAV2168864.