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 0x7949593ad6018307e575cd05f9800e8b545afd9a495d74c1fa428a9f892b40ed. 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/b7561021-89bf-4901-8f2a-144957127c77.json and https://artists.proofprofile.net/proofs/artist/b7561021-89bf-4901-8f2a-144957127c77.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 0x0c977eff35145564980775bd11287c9c3704817de965fadc8e14c95957bfc427. 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/SE4RV2208001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a38f62bc667625f84020a92e185a7256f49cd572b97f5e8f540dc22fa8b123. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/SE4RV2208002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8a3eb2f29bc35ead82920ff126d354a115042661af906bf67310add5a5c9a8. 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/SE4RV2208003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ea8ab7be6cca4940e4e615b433d6372aae2bf1e83772bbe6c52541a6ae98b8. 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/SE4RV2208004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536374e80335777e3131407e9a97d60cacdc69ae2d24984305f097c2893e8a36. 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/SE4RV2208005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac3274ad8899f9cfb6eccb58665a5bac5ec911fdfdee293f66eaea7e261638d. 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/SE4RV2208006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffa3925f7696a7875ecf9f08a4abf37d6b5bce30458844dd76ea71194041a96. 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/SE4RV2208007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421db2f8adeea402af6168aee811320b49483ad9a8ee374038d5b02112825d46. 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/SE4RV2208008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90fa33d843150252f56070212df6502aa058ec22ec5e3083ab8179d1d851321. 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/SE4RV2208009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4af56b30f03e109467493c28478b928b1c41fe9b1acf954f9d37fb3964c1ce. 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/SE4RV2208010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8393d390548ef726644bab32185887cc4490683b1b8bb24a8e9a981aae12bb55. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/SE3D71801101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f333e8b04594df85a95efe30b97b5dd6e2ce22dc7f0a94aea228bbe1e7dbdd9. 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/SE3D71801102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ae1318b293c6ff751303e1249d45bdf54dfe66c347951a6cfac63291e0d551. 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/SE3D71801103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd835c0f119f5a68916e1dadf2c23b2673f57be3671f7899d0e15f215dc3ba697. 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/SE3D71801104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42195ce5668676d2ef769b44062a20acdd60a62a0d6f5e0383adaf16e20e6980. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/SE3D71801105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cf64e1b277c932616ad08d59b40314868acb63bea12de5259c13f09a5b3ad0. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/SE3D71801106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfab12d70d6075adff21578b402bb0a4f07e04c4a95ba72232a1ff79c15e915. 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/SE3D71801107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7132e7f99c8792ef36da4a9f29bd97fa68e3a9bc80b8d8e83b73f726c373c5cd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE3D71801108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf06e8dacca88c07d513bdf9a316286c82b70a7fb6c430fa1454008592e734b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE3D71801109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95de2b023bcb3af3c2c193845f5d4293f629111bd89d25562b521b5c3cc614ca. 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/SE3D71801110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e356861d1e749af879954b2da33974401b01d16e0c2c3784a1b09d1dfdf2f8e. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/SE4RV2101003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380dcde7c5197cdb7141c9c57ca7cb239b1b54d02aafe6d2d7ea53e6a95e2302. 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/SE4RV2101002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57852264726dab8209e084757edc1ccafd367e58008a3f5eec67589b6d4f32b7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SE4RV2101001.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a06276a46c1c2c4a1cf6323cd8ce1d3054e20cb68bb7d403c1b6db111a16d4c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SE3D71701304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047c8a4880e26d8fe8ce5ca871cf448c01421535c3f92194d2b756704e8bf3d7. 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/SE3D71701301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b01b90fb1b68a645d7419c4f9044e2554d46508f72c17c71e15b554eedfb2e. 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/SE4RV2408002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07d6d3f49a84eb3284d5163b8481688606ab68090364b4962ec9a95910df29a. 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/SE4RV2408001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d4152334b0cf607608d62c9295d0ceafb8b4eeb7349f8aa824fb41011ad1ca. 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/SE4RV2408003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95d8391afc0e55be6e74f900bf6f58f94e7f85ea6b800aab9392ff723040884. 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/SE4RV2408004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b01b90fb1b68a645d7419c4f9044e2554d46508f72c17c71e15b554eedfb2e. 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/SE4RV2408002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07d6d3f49a84eb3284d5163b8481688606ab68090364b4962ec9a95910df29a. 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/SE4RV2408001.