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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930fd4ab3e0356730f73f06dc036b1ddb31771ea6088101231a20cbb9ce96a00. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1023820d-ed64-4682-9ece-7525ecbb3f66.json and https://artists.proofprofile.net/proofs/artist/1023820d-ed64-4682-9ece-7525ecbb3f66.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e794c8793c318d23432f7402c6340f22f5ce6cd5981a614d92f9cc75996dc3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBLV62122389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2e3d4a80b763d7126364d3e6602598a6889c46079ce324b3f6f49526d7ac6a. 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/GBLV62122392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5019bf351919c4a5190127239c56c722344830bc6c626def78f80db9c5a9db61. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBLV62122391.
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 0x699c2bdf2d0f11fe4d1b7e5b2ba4b03d116b783303a6f96bf495d5f095c4c6bb. 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/GBKQU2156929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cac8ba0be2441b375949f89ca225d5ba7d5f6a2ce8fe247ee86be5421122bb. 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/DEY472378225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cfc857de91c05ba734439e191d3cb126bee32e292776223874ec87400676ce. 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/DEY472378226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1629fb97c661e73d1ae5973cff7bf17ae1a418c1f4fd6773a8fe2995c3c382c3. 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/DEY472378227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ec005031e02b1babc5fe51a3257f3cd69e2989e52c0c1ed457aedc5e901404. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEY472378228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14643c18821c1e5b4eb60e4b1bc2f7fddd03a9f7585d7369389008ee9ed6e20f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEY472378230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31805cc878efb2ffbc6b1ef1653139733f918f7ef478a60c90afcbc88b799368. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEY472378232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb4b9f86ee9b073535323615151e84c72f33270bb1ad3b8c1dfd196cb02d5f9. 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/DEY472378233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65bbc21ad516dd4c52f7943e0f582cf01a1c34c36a20feafc5c1e83d3cd69fe. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEY472378234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0036f1239149219119024f04efb58fe516149e3360410ab117bedfa6cbf530. 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/DEY472378235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c97211c8f29a2d4be5be2391fbc22d4685a73c6442c8cfa726b975193d4828c. 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/DEY472378237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc000b04e9c8b62a876a7cfbbfc8b0533e734fef1205a3a8cf461621db88f14. 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/DEY472378238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28ba17cc43c347877f438bf29863447ee150ae8f6a55dd81c31bc79cb1def9e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEY472378239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2ff49c0ae73ef4a6e8189666c5b5be2f0232ee6a370a71bae9739e3b8d800c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2292592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59183f79ae42cb79db8677111b925c82ef5736d633796a2abcab69c2258f9dbe. 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/GBKQU2292593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603330b45238ede15b580ee5437f7a558aa1acf5a24a796a263d3e9d407918cd. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBKQU2292596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79daf8ba638ff851670bfefd38784361c938f1c4ac700cefeb6474ae83a3d2e2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBLV62025272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc176de9987d240f3141efd9e1feecb7415a0a3b005b68fbdc30c0d2fe31503b. 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/GBLV62025273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4838c62ae7dfa7b87ca42c7b6babf366bfe268860960e08ab434ad2c68871c2. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBLV62025277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253556d550eeac90c343f2f8553094655530b1451e6e4d3419fa3aa58da15b53. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBENT1666576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cd99f109321b5d1b25601daaa7710539c890e033d6cf3e907743d9bd720859. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR2383093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5988759536c7ab4ca27b1cacf616bc10216bed0d067be5dcc332af2aa83ee3ed. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CA5KR2383092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57d84e2eb17ff4d6411f6725cb32af5517b14b6bd5e0d2f0f69d0aa84e9770c. 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/GBKQU2359373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2963219d41d29367f0fcd71b5b71219821c997c6a4c09386a38668a3ad9e4f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBKQU2359371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ec62583adb661bd92ea29467955c015d3460bc7d4a9eebdc09105d5f78b9db. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBKQU2359372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0284e66767856e995a494d725c561f3e216d8f745cf59e164b3f2c77a9bd06. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2135349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed413c3edd8d2c825238fde7c215fa6ea5ae7ad881084b2e9ed8de8be55aa9b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBKQU2135352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4e5324e79ea584bfe358c85cd5fe2b6e2d6d965252cc47466278b851bd8cbf. 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/CA5KR2149849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa523273d36a89a2824702e5a7a82ba76c05df15bb7127de1efb24b4c1567705. 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/CA5KR2149850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77975a76e26b87578e608b9076d07295ce47ca1a6874652eaf07db1201f96c04. 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/GBKQU2396880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f88138ea6e3b987fc692cd3eb1f1a3e2f9893bf83d9ba066d923ed0dd9a21a0. 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/GBKQU2396882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b1b739011cd8b698bd98ef07dda5bea16ee466da3716c4de00b7f671c09f04. 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/GBKQU2396885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ea54c159224a2406a16bb0fb6f39d6a56571b33862dcf5bfd9d567074466bb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2396888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04b9c4403201fb5fdd1fa89366a5ba9a127c7a81ed74da0d1043edd13ed303a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2396890.