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 0x127d7d25fdd0bf04ba8ccf330332b2283848fa1ce8c3d4ea8b77ac0cad793ca7. 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/dcea238e-11eb-4c36-8132-7307adadb2f6.json and https://artists.proofprofile.net/proofs/artist/dcea238e-11eb-4c36-8132-7307adadb2f6.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 0xb190c36c2b14288cee13cfa4326f90c7e9d700bd128a447731adf4cef8bd70d2. 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/QZK6M2455246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa319609ae62095d4d61865dcba87dbfd5e290465aaa6a973fb7343cfa0d5a2. 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/QZK6K2454221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937be471f723f72d62e540d40f5a975efb71be5eaa6c1505b84ea97388bc07d0. 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/CA5KR2459934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34354de2b9bfc2161f4ea7b83105fff7583820e9cf347dc9fb6b6098767a7b23. 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/CA5KR2472409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5838dd07fad1e68df1b2cfc763c4209151cb2f7662d39a202ac31b86ab7e1be3. 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/CA5KR2472672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c786aa8d60d69c9245a80a743896e4b0e9be7591ed639ecb4601ef54c23620. 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/QZNWZ2498339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d75421d2d8e0624b209e2cc6befef8e0b2c39d4c90b8c3f3dae49d8e8e05491. 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/CA5KR2460690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3deb0126943a691d6b0c4a25a6f5c43ebda502f58ab932be8c051d3cd399daad. 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/CA5KR2466697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefea89dbeeef1de14cad578767a82daddb425c712f7d2512247d333bbb887dc. 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/CA5KR2466698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d2e97c755f9fbf5161c00eb3a5ac3507cf50827a9c72d33f177c74509fc5c9. 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/QZK6H2328028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b51c511b09d3d9c2f99b6e78a927d23264d45ea76e0485274e6fa26eadf4cb. 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/QZMHM2363227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade71c9904f14bc9a9e48cc0436458e161a204e7cafd9eb970f9aaeb8c1dd933. 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/QZ9452200292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adb8a00ffb3621edb557613deebe3a83e7a2311e56da0126bafc9a10d1d906c. 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/QZPEW2472714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d57bfb7fef651a7e5640414aa1bd2c1a551cc5998f70aa103c1b9883281b39d. 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/TLVEM2430985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fd73cdebe7e582fe80b3dd9234a194dd0c717370c5458646c0fc90a24bcd7b. 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/TLVEM2430986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89a0e9b37bd9043a54e5dd806a5f12313bfc76a249af5b171e3ba98226c74a4. 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/TLVEM2430987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e896a274fc77a19ad58fc002aae340f608543b0e211f4445f4ba70874ef091. 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/TLVEM2430988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf337c97bf98846fa5a93586c72b0fbbaf91da5c8c9bb3471fa03e3b4184f616f. 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/TLVEM2430989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb4214a5fcdb02cd35ebf501e2eb70d6cc05901431d09d37369b7833f5b75cc. 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/TLVEM2430990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eacd06d5408bd0d4b2a0cdc0b301d66b35de339622e93f6f84dbad8a3ab3671. 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/TLVEM2430991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e261cd22745f24fa4f8babec821a25b447263be2eaa42a59f92762ed8d86c0. 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/TLVEM2430992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4a172709cf4f590bf0d38b52f1c6f5f8cf0958f382a286851c6f343ed9b924. 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/TLVEM2430993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb4b573c07035ab7c4a7b5b979a76f4d7ca24ddfaecf0e85c1b14a507daebac. 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/TLVEM2430994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c3c1ce265f1941b6d4d40ae92399a3b114eb3d16db2b6217a9c500bd3ffa6f. 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/TLVEM2430995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b80d0cfcacfb08989bdf55ddac0ced66f74b0776234bb4b8ad42f74517d00da. 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/QZPEW2405481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1d618a39d682951bde56576cd5a785b89c99289238e63b192da618ea5eb6ca. 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/QZNWR2441729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adb8a00ffb3621edb557613deebe3a83e7a2311e56da0126bafc9a10d1d906c. 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/QZPEW2472714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3eb3ed7d0adcbed5c6a8c6cfbab6e001f5ec0f85ce8d08a5f7a24ecabc08305. 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/QZK6H2340711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6e3be4300d7a51f4d0030643e5ceb58320c1496e01883b5b04e5d92b9f68c3. 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/QZTBC2428780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b749c5f36d3165e93c6c0299a881bedc2283b87ffc2ad622a0c7d146b984dab. 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/QZK6K2320673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2074dcff7f53909f774c721aaa4bc99fcba3a6376fcda9dbf32a45717fb75c0. 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/QZNWU2451022.
Dog Who Looks Like A Toilet Brush BOUNCE (Jersey Club) [Extended Version]