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 0x1657d8036449ca7726f31983e87bf7a5de5ab134c54a8d1a4913bbc8dcfb6c27. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b12a3950-d562-4441-b84b-31ec1d715825.json and https://artists.proofprofile.net/proofs/artist/b12a3950-d562-4441-b84b-31ec1d715825.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 0xd66f7df5df57ceef7c1fc5ad473fe52d1e2bc2214023598348d38cf1576b5bb7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEU340200232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a785437f2146b4be1b6c35830b48a33ca08040e761f95374cb0ec1b9c4e35f. 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/DEU340200234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ff2e9d1906de51a90a5d02e0ba390075357d28d3f87405d8d1c84c3520d582. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/DEU340200367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d33d753b41b660f08534aa5203d275521c3fbc12457df719eeddca1f387b468. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEU340200368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3793433e111d081767f7e2d5d72e3e1f0a0b8f39f53557e779dcb77615864233. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEU340200369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6239743a9944ad45d9ac644a4537a5587a06ffded5d0a6ea1fccc05f70ec7a5. 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/DEU340200370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21062ca96b9705e9f275e78ef895ebc32c3fbab61668596fbce67e2161c35b9e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEU340200371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbc9acb694ca6ef08f1f2f456ddb22811a3b12030c2f835caa5ecb8296493fe. 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/DEU340200372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9fab0974ef70454fff25171c0a5dd4cab4cc0482612f2f4d31c4de5457ef13. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEU340200373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b88f6f877efdd37798e63f58b7f626e7cf302137f24185fee53fd2d3a5c614. 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/DEU340200374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b12c53b09ae1394122a6ad73462ca41a49b2c7e33ecc0511e56a33c722968e0. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DEU340200375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9295f6be581e6b7a0fddc868075698e134d46756ffe12a0a3272834b3ca3167. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEU340200376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6996a7cab4c5069ed65b248c34c4c8572bb0aa610233a66059d8831b0d9a4bf5. 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/DEU340200377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e36066e491a66e3c3bda244a8aa06fef7a9dc12c7f4d652a156756bfa814cf. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEU340200378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8934db7efaeca19b5f587ea3e35deff64f26f06ff5fa05e550928499d4d9908a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEU340200379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2521bdcf25b9cac36c2e31623278d44435797b856babba27349178569c23f9. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/DEU340200380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb288f787973a9a11ba69c58f2bf271629b560265a84b39a2d0319628544d893e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEU340200381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbba4025cbbe51eb29d73ecd4766fc2898d100846f4c7e0e822d7185a615f64a. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DEU340200382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cf374106f9ec86791168ee9d9acf7d9f3e16c3bad6474561fab479d7249ca8. 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/DEU340200383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c3af70c3dfd593ed8495d2ec3e653461a3a49aed6061f796c65be0cee57e9c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DEU340200384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b0419719addf8d5b5b552bfa4fddd3bf1613806578565ea3ef60ec3d3304fe. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/DEU340200385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60f11f86c84201fec4fee95631f5989217d4465fb513d63e9fd7d7b38a05919. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/DEU340200386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef03bdb3e1d319e99035ca566f5e73a18d1d24bf94d64c23859c2b5b14f7f34. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEU340200387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f74c9d8b38b004c319ef0c08ca81a1346ddd6c0f06062354806cc319e3d74e. 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/DEU340200388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908903a0b3730579437e163b53545db36d00a2d519f84c63c4a9809ba9fba310. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEU340200389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee4be991e51c37fdf22bf0aa18c732b0bcd782b86763f0427deb8269e0fa035. 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/DEU340200390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e4f08e302817af778a782a8c3d154278b0474d0d28c8d0265b32bd00f69ba2. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEU340200391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966c56837c10e447cef6f80edd5421b09d858d4dd9b951feaac2f2a7dd7874fc. 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/DEU340200392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb425326ed52bd65ee46231ede928f84c4e0f6914fc0f0db735d4b415b0027d96. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEU340200393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9fe4a6ee778f9fa5a655c4d9b95e4fae64d482987dcf2c6b7b516da974aa09. 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/DEU340200394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04096f1868e05e1f597082f719219aa76e48b5cd6649fe41e420360bbde0684c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DEU340200395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d9893cebc83e49eee56cb7372674940cde5200ed7cc5acf6f955b55d907c3a. 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/DEU340200396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0020d5f804fcd97c5da6ca0bf045ba8fa4bdbc1d25910c16d4766722dbf66d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEU340200397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1335dcb4cb5eb455f57b37e14418f54cadd5eb36f38841baa325b9533fcc2a7f. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/DEU340200398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925e10c5fd63f45d68cfd2f25938888b969b5fdf691233147d874ffb55539a99. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEU340200399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4f509a87ca1d8b8e2f76f7732ee81a3e05df065d73c1fab1f4c2bbaa22c7b3. 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/DEU340200400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08fcb830595894e0161189ab60d1c6115e0729c797e3ad5e1448eea38201a3f. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEU340200401.