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 0x2ac695b3412ffde81f44b396007ae4f17dce41f9e589b68568082941e2608e26. 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/50b4d34e-37da-45b5-a160-3fa0dd433139.json and https://artists.proofprofile.net/proofs/artist/50b4d34e-37da-45b5-a160-3fa0dd433139.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 0x378ffd2ff681dc2465f8657f6b0a47f63b8f7b98015b8daf1d6f8424fcccc011. 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/HKG291601437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd2a62a5bb98371387dbc6f46b0d576869d43886bfa92c061008d3e0327e726. 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/HKG291601908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a9c35b1b49101ecf092ffe218c77c3e6821fe8924fb50d114ed0d895ba28c1. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:06:10Z), 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/HKG291602171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c664f5efae4f30f75167636bc0a2788549dfff0783f51d6d55e757dc31ab86c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/HKG291602174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbef425f8bba3d832813d5d71203335924679f45042d8699813fe8e2863b50a8. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/HKG291602175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bce4d30dbf1879872d6b7b47c0e416bb5b138d56fcf99299344b9a4ac436d2. 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/HKG291602178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd2a62a5bb98371387dbc6f46b0d576869d43886bfa92c061008d3e0327e726. 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/HKG291601908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703e6587e809815bccc5d0eeb73e79407669dfb594ae287290b6495eaef04bf3. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/HKG291602182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe906129a6e0eec7c9fb60a785b9a384f6a8bbdd9bac447021e31f63668d35548. 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/HKG291602183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d841db91865d31a2405237aca531b8178913d505124e601cc209359586a867. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/HKG291700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4979a8c02c5fa7b11ff4c5c18c8e1c2a7629be3a9308fbf96c243e8a1e75ff23. 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/HKG291700052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e4f4cad95a2e63a96e86de55c3741e62daf01ab8f97a946e394f8d11dec291. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/HKG291700054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4654c51848e828eb8b94f88a6310be71303a81e0be6cafc39c827a33c5414b8e. 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/HKG291700189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44f1b96df9d472d8b69f102a29ccc044544d523e3757119da83716e622dfb4a. 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/HKG291700200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46fb2cc6c6943412994da3a325b50a4ffd801b7c996319633c07bb8afc49b50. 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/HKG291800147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd041f1501372e4eeb73ea203636e4363e022eac75756fdad18f2e0cf24dc3b7. 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/HKG291800149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54feea3365fbb6b2b5dff2ad2ab37f4d43f2a8d16ab088519f4856317cc6c7a8. 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/HKG291800150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4127093fe5b750d21cc9666f90b173a48de111cbec7dcf77906db1ba1f2fe6. 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/HKG291800154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014a8e41abcf1d319bf653bf77d9f892e20b77992cd8af596207ca752b17d41f. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:32:37Z), 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/HKG291900093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b89389da48b95f940fe62dd544bd6c8e3cb84a9de2c679c3dbf878c951f783d. 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/HKG291900121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5890c95884da5688613966f2e8769105fd67c86592b104f1b0bec92b996c955. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/HKG291700062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90facdc63769dc5f7ceb22b5c8c8c6cac55a8be37a6adda1a32a2cb259e5ae34. 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/HKG291601436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6b33b4bbabca0b17b0ad88189bcfa6c172e7e0e2e53dfffe0c1c600ee59829. 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/HKG291800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb06762ff950dd227e94339fbc2485451c1e956e02b95df7df41bcf5ff8f946. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/HKG292000159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19947a59da2012a8ed31708d195cc5f9f6054350595e63cc61f78770faffaedf. 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/HKG292400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7aaa1acf41c6bd7fe9526fe31b80040c0f5e1c8c55b5b416c6343a60897720. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG291800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3594235627a9b992db9bc44d6f80e334e1ec74222b25e754eb5d538add57cc. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:06:19Z), 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/HKG291700154.
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 0xc350465ea0646426a5793c228bdcdf53e89131c7a1c94553ed73b0fc91437e20. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HKG292000179.