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 0xe2bec6c1b36eb5161038724c736c3357ad6bd842a263c60e251bf826868d2bfb. 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/d7cf62a0-e940-4cac-ba7c-d925b61a4329.json and https://artists.proofprofile.net/proofs/artist/d7cf62a0-e940-4cac-ba7c-d925b61a4329.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 0xe094f99b1c31c6d8629dcb6980e98e52434ce6c03af6c3a31e025084140ad931. 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/QZW9N2225700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733dc516e0b03bc963d18a88a713a2c21123a1778e661ca60869b37732a7149b. 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/ESA011914318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdd52061b40e28dc3af954c91db1b0efa40f282443f7ac7470489c45cbacc22. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/ESA011914319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7bb1ea1da67cabc5fdd6741bd7728d13df775e43f14a36a039259faf8d107c. 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/ESA011914320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256a91b14f71a129c9bf2f6bcc5ab5ef042ce1cff8782415f966a09448f01861. 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/ESA011914322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0277d8a5a6c9c5b239da5c11f5e2bb362f2bf22ffccd069082e79ad2fb25652e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QMDA61505891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b19c64efc7f313ada8ab8d04a5755cbca6b73174726f0dc01186f0ec2c6a63. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QMDA61505892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73ceee17e4873debc0b8b60d459b5f8a69a76049f11a6ca12e24a0039b11f66. 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/GBSMU9168373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459cecf9f658256087b59b2f9c1a070f6d2e22fc81da2d9868fed97cc9a2e4bf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBSMU9168374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf5da160318507bb528719a6057139a519c74e7952566158ba93dd5e0105711. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GBSMU9168378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67f1bcd92923674a2533ff6e38542922d77a7183ea197f14bc33fbcab5099f8. 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/GBSMU9168379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1888f9ec193531e1d0f0a15e918ed68bb8502dd7eec8e3536d312ae2d76d869c. 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/GBSMU9168380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bd5efc242736318085e7ded62a94eecdbcd87333f88ef77fe022157e134a57. 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/GBSMU9168382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4de2d8444850f71f156ca2696a2032dac75a4d19b0d27b949c49ee54afb69fb. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/GBSMU9168383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3374331b800c43a444a9acc0160c8b41393956c30f6fb85edbdedd4c390782c. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/GBSMU9168384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25775f5a06330dbbd45a4e969b053feee2a7e1a66ba3ecaa5216a69e862c23f5. 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/GBSMU9168385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222e72fb5f67ff92cfba985517e8acee074a94dc450df34324e309ba67784a91. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/GBSMU9168604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c740106e72ac7d576458865a5d452bf496d1b5bf66ca899808d9eafeb1940b. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GBSMU9168607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c54348e14a3d1507e6c80d05b0b75bfa0c0ef644cdfeee0268c59a6c20113c. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GBSMU9168608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc773328d7b078c055e7b93fc515e5060614899c117ee3c887df3b09a93c89e14. 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/GBSMU9168609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f347d5c0f766a653fcb7468df5cf69afa8206d5b5a499592c0f99ddbc91f10. 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/GBSMU9168614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2668a0f306bb1c7338cc53d9f2124950504164e57b20444f7a4f753da0e8199c. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/GX8LE2337408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91df43b013fac024baef785859c5c4f19aa6796b23ca0e9b95d375aa9dfcc49c. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/GX8LE2361993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f326b564d5a68add2d8fa5c81b0cbdb4772ce54d23ca20b759da8469b3a4ee5. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/GX8LE2347845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd19b033dd9a1ab014b9e2e0bcd0448c39b3a2dfe049413a2c1604c1e2f19a4b. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/GX5MX2391487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f41598cd1fba7a5609e815210dfcee84a2f157d4118e6f988ec9a2abe1e4a0c. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GX5MX2350305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf25d9aeab57484e68fb65fb4b9178ac363545f97145b48d56f02f3cbdcf56aa. 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/GX5MX2355878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5639c59a354aaf66b74b5dca590d8515dc10c9bfa4f55ed9567c38be19cd3521. 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/GX5MX2313156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8ca516a74a33fcf2372e06ca5a67c8e553e89bd7ecf30a705068fa0887273b. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/GX5MX2383518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65924f262423bef7484fa910937e8cda7556615db743f63d936ae8d945cd040b. 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/GX3HH2496640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab28c349c55a0b13893b5d9d425619727681b045c3df4bb2a17444158f45d49b. 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/GX8LE2554056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25baaad018e8006c7d7ed398de0a13e46bcb82bc60038797da185fdd7dea0fe9. 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/US3DF2029548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cee7bcb2295822e826c7f2f189780a23944cc2d0ffdecb995f378edc26d589. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ARWID2100751.