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 0xfa32d511dafba8891cf2c03d9eccc275b168cc9dcf97ed996a0c8f4a5d700785. 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/1c6c3b7a-ad8e-442a-94ec-249f94152ce3.json and https://artists.proofprofile.net/proofs/artist/1c6c3b7a-ad8e-442a-94ec-249f94152ce3.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 0x2ec7de70f29da8ee1c84dcd8bb079518d3201b83e5da48b87562fc92aeefde82. 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/QMDA62481311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61a99f7b88ec771bce6d7be8ea78855bdaca6c24f3c9105e5d6783f209153ac. 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/QMDA62481344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54a3700280d85123fc6a3f7e9c3ae22f751dd9fb01219126152fb331c37a5e7. 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/QMBZ92445152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd36830e7739462ee705eb9a42684f54b10a3537e84b6a5408b2e17a86940c1. 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/QM7282482449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aefa656dd8d63e2d68c0b39dbd736c2f5732c2b884b6ed9b01f862c23081871. 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/QM6P42492134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbaf5dec515e7b7ceef1c793e8a47ea878595e7e2ea1cc593b253997c401a18c. Chain 2 (Bitcoin): anchored in block 956995 (2026-07-07T04:27:57Z), 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/QM6P42414926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02927d6618e73ac8f5bdb8878ec942f09c921e00c4094b4335bf9a89e97ecde5. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QM6N22436033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf840be82f56b41e4ba3bdb125dca6e07691811ac6516defea1c1d0d245ca0b. 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/QM6MZ2446163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66e00c40eaf56f74829c674cd9bed546c35dd86ec8358f355fc771386e6c198. 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/QM6MZ2403197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640a1e709f8a6eecefd946487f1d0956e6a0aea40d033060da0c1fbe71e0f951. 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/QM4TX2400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c43ea6e728f0f686ca0fe3285a71619f2bc91603035b63bbae3c01e9fe42ac9. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QM4TW2469690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba82068f21dee6f95c975e0ef1f425b3cd6a526c9e6c38a5ebe147a069e82bcb. 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/QMFMG2358803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec4f8b1f7aaac7568c5b0fb59c4a69f59e37315211daba507809ea708079cf2. 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/QMFMF2315130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f82507718c741f25303785726589b7674e7c86b5e366cbf2e41dd6974ea478. 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/QMFME2327797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe66db387172b8a1c9354f1d9dae86e7412641b5f56158c27c25e8845b9c6dea. 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/QMDA72344009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681fd2439225560433254535812fa84ca136ca58804138d9c0483b3851279c10. 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/QM6P42365092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e257acbcdae10abfbf50867318263e6e022e24ef51b6ce1c155987c7a65b815. 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/QM6N22321413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db4dea176242b6f023481e5f0bd6790b6722243ea1396a0fcd460a1cb351477. 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/QM6N22321412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1290549706310270dc9a74f0ac7355d45fa954ad5dfab60d3e3a4ca1b00a12. 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/QM6N22321439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3afe4c35fb0396f58c604f6c06c5508506b2d765f1baa72e53e893c6fef1e9. 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/QM6N22321431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28dece47ae9aa5378173efafd19d8d73f42ad8f9ba840b37add3280e35f04bf. 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/QM6N22326942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780b33c523e4086f5ed566a41765adf33d7d86956e8453042c8be4239ad8f2ba. 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/QM6N22323437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b2d57feec562b73294aba29e5121249c980d47da65245743534d9af805aef5. 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/QM6N22327077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe187677357bf8c07848e5ffb100e15a92dac55036688e948b050386ab1a9481b. 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/QM6N22326925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfed6589182f23bf6098b44ab23c4ec70950a8173d1121c8cb75b06f4f7b4fd. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QM6N22321410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a341675a2a6664803406d982d4610daf2530bce9111f80489222fc456f52150. 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/QM6N22326889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2308be82a023c7e124106da6ec09a66a7a1c1143947154e93d39a9fa58e0811c. 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/QM6N22323431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64524c836a14a0014c71d021e23f76cf77c018b8b3bf136fddf2830b491e60c4. 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/QM6N22323365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21cf428b1f42651d0832e4f605efad3b1741e19ed7959e2f6b3e9328420b8128. 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/QM6N22327127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40d453613b3963f68a9f5beee8ad80d87ba32e9a0c739e46ff7c2a98df5f641. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6MZ2300541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc497675a222fd40f28a93cb4bdb2d456de270ae09dc863e1b5cd5acd7a400b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM6N22321461.