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 0xdb4adeb813d7f7068058f1baa464e9c494c819fe6db07322c6f8d47464457792. 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/68fbfa2a-f2b7-4b63-93e6-80b6a320afb0.json and https://artists.proofprofile.net/proofs/artist/68fbfa2a-f2b7-4b63-93e6-80b6a320afb0.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 0x2eeea25add03c11abd279cf4d83336c9c63f1d46c7899c5f9a5bf4ad35f48385. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QM4TX1770095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d60d05e940b098e467262c7c9c443065439a110cd03195e85bccb817cea47c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QM4TX1770098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a70caebb50cfb05ac6f7cbb4db3e07fc0ef1254a6e45d628987ca7d3271d18. 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/QM4TX1770102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe687fdbed11e1bedf436f2467fbf1102fe3d2706ee7f315a47ab729e51379066. 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/QM4TX1770104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ae1e5838b109c5b1928b2de7d79c48372164693470f0bdb1a37fa637fada7b. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/PT6GV1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77136e30e26cde0b76076ec806c38dae0f427d52941c8c44b01ffb6fd8b5819d. 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/QMBZ91722999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55516605fff757352ba65e3bd1083cfdcd135bb8466ec317323c823b9c6a075d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QMBZ91723000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdd629cffff3be70eb670fd29b51a85ce7ff1329e075c5897cee48c131e6065. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QMBZ91723001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa402fac119cc93eeba9c3490bf926351bb492b83a39a1131220b9a32b7ba78. 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/QMBZ91723002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4b1f5521896e0a07112ed01ddf92e36a58278d4a7eca289042b39e26a2eb3e. 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/QMBZ91723003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2cd791d8541e1bd5243b7d566164d8b5203e28529c8e44cfabe08f20016b2e. 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/QMBZ91723004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ea3b4eb570ff20b978de15d5e0c346b0c8de723a52132e3d087c6aceeafd5e. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QMBZ91723006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bc50e2625ee59c5a810c0ac1d77c28d0bb651ea7b651ac999a8f8d45fc9726. 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/QMBZ91723007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5d734c70946edeab9a9e7a4f5505dddc3afce0881dc9236402615e997f43be. 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/QMBZ91723010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb079747aa8667681687571efc9f00f8d0993e01dd638d13f6dafb3b1cbd66b80. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QMBZ91723011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e40bf4ee10d8133d50a074c3db8ae195bfc9646e89f9905194b7b5d0d21d089. 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/PT6GV1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4908a63d347b93a6d7a2186c96541921ca76213e7d5d17a5282e30e45f67292. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/PT6GV1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaffa87750793ef13927beb297c2a052efb2e57cdf9478c9caf15f6e3b72f8e. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/PT6GV1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50f7925f0234b2101b5d8e835ff2ea6d76d159e3e40911ccb444475476708c5. 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/PT6GV1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83124677b4a255575fa56d5b314db2b783856dd1024dcd6d7d381f34a77c228a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/PT6GV2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d36c415cab61dd41f236ef0a5cdae6326e7e5e30350bac56fca87c30c6b566a. 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/PT6GV2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66aeefae6731e33c6373a1181df0b1931a9e1b99b543527db509650f1d47119. 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/PT6GV2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e2bbed585a5882cb14c8a91e482eb241519c7695fdf054c8944268535715cf. 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/PT6GV2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ae5a5c04964997754bf26079f58a278953dd7031e49f6f227f1d527ff4ac2e. 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/PT6GV2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca51b06bd63cfcb3209b085eaabf9a84621b4c916b82d768e3b5dc78b5861e5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PT6GV2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de982a0c0d790e17c46f46fe249c56ac56f25124e0a2c8cb2872f770e01de81. 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/PT6GV2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15688c306cf1eb505b0e5e3dce583af603cbad632cc1f1b55bbea46f56444e04. 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/PT6GV2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef1a133c19487c1051614b3a28d5210defa8472e65a5b697ddab7ff1d39933b. 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/PT6GV2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8f7b24780be6add8a4f51e8970cf348221b78619ec9f91deebca19bef79a9c. 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/PT6GV2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5f43055385cd66777dc78a70f4d62fc62ec4c901317ba966e465cfe1531c27. 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/PT6GV2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33177675694d97dbf8f15859de66c2a3add978142412716a8ada6315052687b. 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/QZGLM2464801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf89e5c50a058a85f8fe6a27f90f69c7f21ec054be74f67bd749564f4ef23e0. 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/PTES12402901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafecf3ddbbd3383db2f436d172480e2188fec4b8fddc14a8a8c2af9f1c7de452. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/UST8K1694123.