thumb|right|upright=1.0|Le Massacre de Scio ("The Chios massacre"), a 1824 painting by Eugène Delacroix depicting the massacre of Greeks on the island of Chios by Ottoman troops during the Greek War o
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 0xeac4b03dbc0c257c1c5a209b3cd220cf416897bcac546fbbddcb47be1ea853b0. 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/3355faf7-5459-4a18-8cde-89f4bfeab566.json and https://artists.proofprofile.net/proofs/artist/3355faf7-5459-4a18-8cde-89f4bfeab566.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 0xc4c76f630be93c72bc0f0237de0c5e0fd220553a2ca5daa116af2797ae13d17f. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GBBPB0402106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36f7019e13c547ab1bbcf787cdc4337307a5fa953d5c19ec7bd83865f6642c3. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/GBBPB0402107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08ae7603acdba2f19e3eb7f0dfcb7157c1f43ebbdf08ae62c065a5411450a88. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBBPB0402109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef139830df08df484ceedcca0963b48164736df3fffb2407a9d15ac70068fea7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBBPB0402110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35f749ad2e9a5f0c8cd4a14397af861c66b4c12c261ebdbb9765546b601b57d. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/GBBPB0402111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8fb8b75758fd4b53bacf1aa5184328dbf14f73dc7e7a3eff548cbb820c4d28. 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/GBBPB0402112.
From Beyond (Full Dynamic Range Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa244244f824e7714a70d1b2e5239258edf43f8274fa895181374a99dabd6e8. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/GBBPB1100940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076c8f6459d595e44c604ed438c6455ea96b4877c9558505c7e5bf7d3c5db2f9. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/GBBPB1100941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0c92bdd9cd39e31d2aafd666480ba817d62a961907de0be4eacfe671a391b5. 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/GBBPB1100942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3b3ea10f199fa3f53cb76ddde4ebaa296fe86af7a67e573aae8612e7278bbd. 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/GBBPB1100943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc115d8c0dc748a92c2fbd7e9710b14cc8487a99bb57b309e4378f7be4673ae96. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBBPB1100944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ec879cc9e6570b3d0c7a463445b205bcfaa4a5a8a0f3e7a647d572e8d7f73d. 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/GBBPB1100945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d178f79f929eeed40d45570d75dfa91ba93ec8af4df388f3d186ff79699949. 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/GBBPB1100947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b72f0b7961cf4ba49179c4d3594f9d8f1b7b989d93ced24220f61332cb1504. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBBPB0700344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121b8314d91015b2be1a6e0b2b4f6353de103a4becee81f665012ab22325d4e2. 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/US4E41493102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf28bad9368a06692829b0c550965570ec7d88228f6b7f87efc1c836ab5e7233. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/DED832001355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2838746406d3f1c65212169171115a22de366addf213418ed10951ecb3708dd8. 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/DED832001356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b681f96da64ab2022831ca800fea32254f17bf60f4f8e611b7420539ca64d91. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/DED832001359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40af21ec7ab72840319ba930c1b1d1b591320d887b1b88125209b438bb3e9f7. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/DED832001360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288c91cc2a05af461094a1db886135541eab22a0a30d79c1f9b7c862719edd48. 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/DED832001361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85c89ccdd0d1273df58be0606656d8b64e2b06cd600676b618a673f5823fc20. 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/DED832001368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c19ac8a96e3b88c1c732600b340e3cd1e1d2cada5a8f51fc1df30c8dc9cff5. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/PLC172401101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb597f43a29a21c1c5dd428a4f54afe1631fc64eb1dc10ceea7192bf80d2b93d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/PLC172401102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa867f13fabb10b41ece6917cc3025bd3e20d2524f73a2cd153f8b5da7d6c2e6c. 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/PLC172401103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328472e84b5115aea0ff41f29e0b41755b35db671998ae3520fea492525bbc3e. 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/PLC172401104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6340efd50e5f39fa8131915edca769102daa37a1ae315b5dbc8833d01ee9941. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/PLC172401105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38dca348a8b0cd04964c3f0ba15e3450e6973b02f39f0d7d2ba3a16ab3c77c5c. 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/PLC172401106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90ae82dff2dac24ff06837e66eb78921696aaf285224250b932eec66c9e76e0. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/PLC172401107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcebf8efdb942f19fa17aea94db096ecbc71982e8ee2c67790761566dda48e6d. 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/PLC172401108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480f03f20706ec0e926fc144e2b4fa2165d456dadae32eaf613378f05c254d11. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/PLC172401109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219b2d0008f3430d55039cda829beef27ef61b9c5e9e61cf9469a6fbb9e367c8. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZMEM2597169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ab74174d7b0c522c99950977b6f03f7a529459cee0b67952de9f4928bd510e. 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/GBBPB2102621.