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 0x8cec49f074fae67ad3570bd3009205d0c143131c8db8ac7d17387f136d059b07. 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/42383432-4d5d-4e68-ae22-224403d4b025.json and https://artists.proofprofile.net/proofs/artist/42383432-4d5d-4e68-ae22-224403d4b025.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 0x8fa78a991d17215d15bb8e70ce77709ca7a63b89468dab82dd88f35c5682dd32. 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/PLC061908734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0731216674e051b21766cc830eab919b5e4595e4cccd87ebc49a7c983ba42cd. 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/PLC061908775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9b59bbdf40e20911eed761bf5f9bf815694afbda6dbaf1b9a6d3e75c60cff0. 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/PLC061908779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b7683317084fe2e87f6083622b01bdbaab3b5bbd23d71bd604bdd64c1f89f0. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/PLC061908777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1669b5f5e31ea8b7532faf27cd8a97b01791875f976e85a2867cb6f5d5c0e43c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/PLC061908908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31dd50811b948909420b2babce8b2d3dc8b0f944c2786a2c748ecd088814980. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/PLC062009148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a53a6fa155874700ef2d1d85f59036b59ef5ad557ad9a9e10badd9da09bf7e6. 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/PLC062010172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735c80ad69661085a4b582b4e01ace8f62a25cc610aa321a34f4b2fddad5a2ab. 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/PLC062010670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db7bd9e6960c61dcb2cbb00c03b052e6b9ff2abbe88ca3f4841598e332ee4cd. 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/PLC062010671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac099cb6963221afb1d3f1af3799893994e43c3bdbdce237b488d714db3a0c4. 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/PLC062010668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f7cdc17edbd3019a53ddbb399d752a2f4ab26006949e63cb0915b3d145469f. 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/PLC062009957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70dc3db4c06d8428e7ca64faf068a33223c61b8130117daa65d546c4cb31479. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/PLC062113938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d2bf7fb01b47e7b262cf44354d67402bfb2ec69ed71df8ab386d228b482751. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/PLC062114562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61481b77d3a8ff8bf9fb5f6042281d8a3c9f568b646db3fcb5d5236792ae3407. 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/PLB382100219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1184b7288f986b421c154277232bbcdbce9068635db73db3476c69b396d46e4f. 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/PLB382300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cab026247bbd534b8f72c53b20d79f126733b73d8bc55fa97ed0e2dc1c92e7f. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/PLB382300389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcc4d4cf3c49c0a78298b721c7b1246789de3f56f1d6c4a11ba2426156d6c8c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLB382400509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e130b51f872fccbaa5160d1e2901ed5838da30f46a0fd18ec284e53037763d. 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/PLB382400510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adeb371ff2f58f8965fffc5bf0e672f74c18e12220e3ae33835444b48aa9251. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/PLB382400511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e2b78cf20889268f7e7939df909209567c74f687f78cf5f1057c5b27bfb6cb. 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/PLB382400512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81f06e294f127d1f45a630f9fa6e1a4ec200ddd16338de60043e8b2ea4acb34. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/PLB382400513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee5021417f8c19ab6b1ee7024b7c447f5c7bfc2df8702c2741155a3f743b20d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/PLB382400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b00574549a3b04255e513f24a8dc2fa1bb941e3fa9956d2192ae42fadd5366c. 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/PLB382400514.
Na martwej planecie nie ma hajsu i dragów ani rozbieranych tańców
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91dc122dcc9f9af53b7b4efc8a9c6746d907ca6f4cd78cd6fc4c6fbed7c328a8. 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/PL25M2500130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b425e601a2104bc9c17bd675f03a715b6140890e5f9a6073323e19184fe560f. 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/PL25M2500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29763271b0d45289d6535ebdb35db54355b72c4edc9917b14b23c2bcd582bf9. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/PL25M2500132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df01e14ad559f1e72283379189b448720b5066d70b4a3a3be0d8f320975de69. 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/PL25M2500136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb1c5588d5559e4bff909c399d757eaef60a04e6ed50f51c8eef2fb19552db3. 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/PL25M2500138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91dc122dcc9f9af53b7b4efc8a9c6746d907ca6f4cd78cd6fc4c6fbed7c328a8. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/PL25M2500130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675448242fe6d8cefdaf3e7ae6b6a91a129bb1abcd0160a493c402d11d346773. 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/PLUM72200142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d1f70cabc28c7d2a3bfbfeb5f5c81cc4c092671a2a7594a9d8f5fa7dc78787. 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/PL25M2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4962a62d6ac3e91af3ac7e68c9fe9abdf533f5c6550752b64eaf19e9dbe822be. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FRX202273012.