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 0x6230fbdd012b6db33769b94f4192989886d0e2c941c53734a1b740a18fe5daf6. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de0b1ac3-ab2a-4ccf-91c1-13e6b25f8cb5.json and https://artists.proofprofile.net/proofs/artist/de0b1ac3-ab2a-4ccf-91c1-13e6b25f8cb5.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 0x394e1d0a9b275fcb4745d1aacaca915391c25d6cf9696440e7e6a5402327e80a. 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/QM6P42407717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ded493225da9239c2fc7709d96b70c09263b1334885d0b0e286f705865dd864. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM6P42407719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202c456bb546593a8fdb7c3811788445a0b501cfc4951481202c34b23807d122. 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/QM6P42407721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31f466af369181e78a0acedd70ae7db6f5e3f9e761686c7c8fd426b53aadab9. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QM6P42407718.
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 0xd2d9b8eefbaa31009324505e0e1c5c548c6e5bc4adce9ee80e5ab04e387b0800. 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/QM6P42407720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab5ea43e18f70bb0471c2a8ada28221697c7851a9cb6a02ddd7d8207c7230e1. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QM6P42407723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1397b6bc8bd7b7f7954989dd966a8d7c83cb890068970f79943085cbaabceb0a. 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/QZHN82447311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbccde51d5174cf6477000857e88fd617b0d5f54bd1fa0ca8c291668a50abe90. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZHN82447310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcb739e392880baf49226227981af9535444f77a317aaa6bbaefb59fbce21c4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHN82447313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55b463d54ce4312f9400a892e02049fd2ef45b3f2323471cd1e9b2b120e4423. 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/QZHN62417092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33923feddbfc95dc425fda3f52d25e2895e8cb7093ca9c4515c87d39817da152. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:51:17Z), 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/QZHN62417095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7e29abfc2ea7b69385fb4556438a67f7816f1bee8aa050c0bdfd3eb0e8ead9. 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/QZHN62417096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e2ded1655e421bdd3cc32e27163e7fc95f7524d51b54061d0ca50b1c5a1410. 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/QZHN62417097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4169244f00020db08e018d95e8df1893f79a172a23b8cb110aca4f8ee57781. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZHN62417093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba3c0d42a8a4cb23e9180d4bc87383179425b5d58fada0fbe8b0c2cac9cdf20. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZHN62417094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cbc56f2056be92063cff06189b8b8466bf3346345a9ad1644551e6bf1dea0b. 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/QZDA82465108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdda71d7d8c671d216f82439eccc6573704f6c0d9d5c3d21beeb54c2a131fbf. 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/US83Z2353119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ac74e17c38a45958131df6a8555002023f6aa3122b172babae345f0b439a26. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/QZWFP2379631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e6b6cb9bc3f1b393f6fbe8ea8c6c14382abc44ca83abea446b269b34b8b250. 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/QZWFM2354816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40adc18933db5b314d9cac3a00c61a3b0c8f1b15c5e3b01b1adbf4083813b5e3. 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/QZWFM2354818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970f4c27a0d074b8fc07b5b58aa47e4b571a936340aa90958ca143f6be374424. 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/QZWFM2354817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66063884b0bcf2dc864f2cfc1df6d2d3b31bd0ddea60698bf85564a3205a3c3b. 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/QZTBA2392486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a28150196fcfd5985ba95ddc899343fc30848203250afa85438cd2d45680c6. 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/CA5KR2352769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec47940ce192a68f505e7291d11735c70275e79b6ea937e09fbe8def55165a8e. 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/CA5KR2403894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5960f6465fcb1bb1eb971dad7f775ca6838ea66a5eceda9c3a892f85006fea4d. 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/CA5KR2403895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda65c2602e6ee3db67d8aa3fe09d74b59a54a5254c937c99c3bd95fc49f9865. 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/CA5KR2403897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87111fbe3591ef788d20d5c85819953a07ca735ac8da864170641002b89ee5fa. 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/CA5KR2403899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da6b002819fc36aa34a154aef62c115f320fb0fbe0ee36817ae13db3e0f57ba. 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/CA5KR2403900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6c534ee09118e6c14ed76abb15748d6403bef6166506b9447198d93fa404dc. 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/CA5KR2403902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0e47f1c6e6505c9cfe51c82ab51c5ca6c120c1b8a8bd1a77f20d1473c29f3c. 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/CA5KR2403904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf221510d1e5ae5cde9b469b2a1192a9697f46c38ce22b0ce0ef95047029ed19a. 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/CA5KR2403906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb736429b186e8f9f85be7e57d38b940f5b0da8c8c45617e126fab54ae5b215e0. 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/NLRD52203770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0441b76b2c51f599f565c86786cd7f110e848442aa71d41c64cb339a1182c3b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLRD52203771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa654038408087c94310da9dbde94596380a1ef9306f42cb5f7f33df47314a127. 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/NLCK42414464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84eab696ed41e3acd37cabcbc525dcc337c5f951dcd0ea236be7ebe7e98a84a4. 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/NLCK42414466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106dbb6d04f1d787e3490d4f5db0e60a8c0614f1a45e09e967f8463332a8a7d1. 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/QZHN72350454.