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 0xbe3e328eef1db91cea4745fdb2e5c52e1495b7f0c92fb69fb7c8e38f1d5933e0. 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/8dc16b0f-c4aa-40b8-b08e-a2f123ff95c1.json and https://artists.proofprofile.net/proofs/artist/8dc16b0f-c4aa-40b8-b08e-a2f123ff95c1.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 0x00aa829d8f0d51f0bfd860c06b3d640cdc7dc1d18a4dd228ba56833b4c512055. 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/QMEU32108933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d627727c033abfbffb4e3941cecd0d5db7e20aec61dacb21a0dd317c8e38ff0. 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/QMEU32108934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61170fd3abcfb7f37d1737001fc7d1e1a021ccd55771e1a07e5a189c1cea2315. 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/QMEU32108935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332891274058a03bc0d2fe49d32451f7a21fd1725a908caaeca8369ded5c22dc. 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/QMEU32108936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6c24543691547cf690cf7bffe150fa769389323fd6995723447f0596dcc097. 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/USSGN1900304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4169e844058948d22244346070656f67620673d799ac9e26788b9c91245f4f23. 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/USSGN1900305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18fc8768d0aebe48611d2663106abc1007f79e4b8d75cbd548e5b6d7750cb9a. 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/USSGN1900306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f47b62740c935c8d597066bf8ee6a5146c8d397663ec23acf8a83b059f13892. 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/USSGN1900307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7d9eef83b3adc2347f5018e62b838d71b716aac894ef6fac5333b0164f08d1. 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/USSGN1900308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb382cf2c4a46bb2153a3c6b685a1f4226853ea080d48c8d78892744bfd123407. 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/USSGN1900309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e565a2a1f2456fa825822c6bd36182c3cf430f9ed1f35c1472aaa91b73f04c. 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/USSGN0900212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1b1c3892761aa534883d4c879a92002720c4c5c3f824f132f14aa69fc3e053. 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/USSGN0900213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fbcad26f2fba540cde561baa36178412d259340965c7a4bda889c6fc0bc120. 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/USSGN0900214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e42603fd4fede598c85be61fd917cbb3efc822f4d7ee2ebc5c5132a515bd61d. 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/USSGN0900215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00127134325d43739e1fbd08acfe1426609d8527599e83ef6f6f1064ba2af83. 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/USSGN0900216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a2ae377fbaf530c0c4ec76687c717784a9a6fe37e45c398e300b96f3526a12. 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/USSGN0900217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00e53cf4996a862241662f7b7251da590b1d85eaee7dcd96c233055af46931e. 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/USSGN0900218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23787d3afa28f39bfbd8aebfefafa564951f52aedb541886333f08dfbc2a13a8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USSGN0900219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68957c288d0f11c54a9b1d43791e20350b0cd87f446896154f2fc6fb9588140. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:33:18Z), 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/USSGN0900220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71645454899baee6fd94b7cb83c6fe40d486c8ae6270ba2eb830c8a79a04ef84. 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/USSGN0900221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04c4bb3999479d53a61aaf645d6ad06b3fad033dbeec281bbb751270a24c310. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:56:24Z), 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/USSGN0900222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb0a117da0d12290638686cbf516f11c9a16f5f3632afb5de5d3ce383b598b3. 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/USSGN0900223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6457b1b984721e74ea05196db545b411e2b3bd84495abaf7626aef5f7c4acbb0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USTC10614885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c651239378c783e176150afa5ed5ca572608b1fb7783e92eba630f473beb6d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USTC10614886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb060074dc4c32c29120113462dd073fb65898688c53f60609d1f24f05bfc1aa3. 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/USTC10614887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0aca34f2530dfa23a841871c5109b66f7ea8f7324eefaba52f9695640c4fef. 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/USTC10614888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8fc8e8c3ed44a2ea01f78743ffea181eb85c91ce2fd935dacbc82cbaad1dc1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USTC10614889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795256ec015503e2b4dff03d111ac1c90d44bf0ea6d84b769f3aa321e07c6dd8. 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/USTC10614890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecf8cd87c640e3c2f64818cb0988bbf93e940dd38eb31eab628be01723ea896. 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/USTC10614891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf907cf1bd993e714a8543c04cdc4e8d0c1e2b2e9b2068cbcc8acda49c25e992d. 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/USTC10614892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92390199d93cbd1c62e07cf5d4646d7daf6214bf86e1e7c4e4855847d5bda10d. 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/USTC10616411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6578b29ba72e7f4f6ba189593e31b939a780ad92856ebbfe854b1a5f56161404. 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/USTC10614894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7d9eef83b3adc2347f5018e62b838d71b716aac894ef6fac5333b0164f08d1. 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/USSGN1900308.