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 0xb4eb5db4bacfc0872af5951e0a5086a322dc47860e048e8f9891e3122a4b801a. 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/bc349534-7838-4986-98a8-14bb9ada70f7.json and https://artists.proofprofile.net/proofs/artist/bc349534-7838-4986-98a8-14bb9ada70f7.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 0x43f8efeb0791fd6531a0cf942e0ed3faf1920bdfacf569daa6936715fb9aa29d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCADI1767115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d4fedab8d161e293e72246663a1fe982d9e0029e6cc60524bac4785f25d3df. 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/TCADI1767116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797194f1b45d43b9cd020e89854cb196310928ac2d8312724a638fb3cea9917f. 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/TCADI1767117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4afb7865ffddd32dc9e647c0627922adb2991245c9aac2e46265ac8a0b9846. 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/TCADI1767118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f2d16167a618dfcec675a985c91f897953f9bc01fd87a3ba0e85fc36a3451d. 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/TCADI1767119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36c49636673c3c4e840eb0a55d5424099beaf6f72075df731f261eed8ab8662. 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/TCADI1767122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de98d0414ec3de5c1c8017fb0978c765d0ae8ea7987516bb8b362bfc220a3d9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCADI1767123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3bc3ae37b79e4c6ab738aadec631524d1b40074a7eb1272928cf6fddabe533. 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/TCADI1767124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1425ade05aa78a3ceb4f234e680dc151d795a5f2ba605a57ad0f84c61024a3f. 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/GBBPP1539601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd9e5a17b668211388de2d1b64d3dd51bfca0893e6b1ec501aa14b0f6a12339. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBBPP1539602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ef521e4aa8791cfdca2b9bcd6fe903770e44c8039d85adc5bb84bf29bc9d8d. 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/GBBPP1539603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5ed9640e3e9f1036849e2fd82cb414ae6d9b93cd61b53876226dba09bab5b3. 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/GBBPP1539604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45635a7de2557d6698a4e431cebfd6401e32f885619696dc26b93409649e5b44. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBBPP1539605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782c37987878504c27205b28ebdb5b6aec696e667c624b0368b43efc7a13c65b. 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/GBBPP1539606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76a9b9b66680e09d1a7d03a6cf68ed4ac38f99b93f31e224a088ce3de840600. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCACJ1537546.
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 0xdbcac11aeee767c5e7a20c2b67ce55b811e009fc6894afaad1262445b56b7f1d. 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/GBBPP1539701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe352d1b1d6a15af74dc2259440206f309ef9900f20deeb09e34a73b540ee99d1. 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/GBBPP1539703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a9d9fd6e78ddeb3467f631e0fa7dde8b2518f6b2a3f58a713b424962f7e9dd. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBBPP1539704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3098c7777ad02c478cdb3e95ad6261f6aefa135b6a0ef90276e863648d5f2047. 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/GBBPP1539705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a965e0b5d44f81ff8ebc95a5e07e99eb14d05d2b5268465290acc561a3d566. 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/GBBPP1539706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4694b46dca8bcb7bbf9f034d88ca5a4f0fabeabc3a0868cdd2051466733b5efb. 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/GBBPP1539707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3498e3ce812b47e2febcf0446cb28d86f1f86ac667e4c269d9efe3aba952b1. 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/GBBPP1539702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f69ff87b3b75ae42191f13fad09426759b4e91ff7895a10de5c046c9804b52. 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/GBBPP1539801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51232f53a00985be38ecf19095736ded88717dda9a048e26bc51d1607d2660dc. 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/GBBPP1539802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda0ca46a8834c5584452b71cd3e38418b6a141d8882004ddbe079c536e5a0ad. 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/GBBPP1539803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57c1eb7a561d12ac110feb9dc6db656eddbefadc8cf5533a211d970ba5a6ff2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBBPP1539804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3930f59ca557b33513252254a8d78a58159ad3a171d15b919c43b7f1de7e74f4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBBPP1539805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd13276924f5c7a531acc8080a24f8dd66415f86aa6910310cf7de88514f4fd. 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/TCACJ1537573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9597db7cd57c300833e12f9a0ae94403b26df422f0e4955dd581fef95748b371. 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/TCACJ1537574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae47c0a995095b6e0aab6d5d1189028d23c5350cf277525223a4538dc89b5fc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZQAY2490693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d49c797baf4d7603b9e872d67b7e36f0964829b3381d1e54234111fc9c9e09. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZQAY2429435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96c0243920598ca4d01b3ddf0493683382816cccddbd31fa2de0a3a98e38387. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZQAY2481370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b2d3f890b2203f428c9d44279dad695dbc92623ba7d8cb03083b7ceea129ab. 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/QZQAY2140701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3b03c9cd5d53e143512b14bfae9ad75768187dc0999fdab9bd0f3c5339e22a. 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/QZQAY2107424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcb238fa54bdb604789726a6fb38a6572a6038cbc22fb10aa9fc23d0bbb08cf. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZQAY2148042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d883018e587c92910a1b74d74cc79e4609750709b0dccb102d9a91e1459920. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZQAY2182791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9731c612cd5b70d0d2f1de403dcaceeb874d10a8d5a702622905caba66a9f64f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCACU1660078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf633e9fec7a2c13f54ad6939c30cdfc668758f88ec5d3c1a55f3faf7d12aff. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKPL1975510.