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 0x040d248c4bb311fa78875eb63c896998a48f460edf9eb3e800373c9728cb7d57. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64ad367d-e517-4a64-ae49-5cca67e2955d.json and https://artists.proofprofile.net/proofs/artist/64ad367d-e517-4a64-ae49-5cca67e2955d.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 0x245fbbd02f7da112be5d763bd3d08d54a37ed6edf196ae7be7dec9879b7c6d7a. 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/GBMA21979547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa39e36a98170ab9c7b962e1896214405b0a7717f655e6a3db1a4fb7b729d53. 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/GBMA21979564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff8ab532166d3bccdadf5a8860404a7428332ce9bc28e1422d86b40b42ec551. 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/GBMA21981072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624459c335373ddc52aba0309e7b3bda817d9baac3b8ff26daf2f37bb9991c48. 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/GBMA21981078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93a2821882fd4c024cba8005a536595999bafdc3e9964647181647621f159c9. 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/GBMA21981083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1022b367b015d76a52d01dbdd9f846843fdd99625f15d130ac1f482a22f89b46. 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/GBMA21981084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a3bcf1a0d0fb19da85a456df4a4516b36328c2a4b5a618f8ffe59af307edc1. 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/GBMA21981090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e40950616affb98f3b1f5232586ff9ca71710549f11589cfeba30cb2074ffb. 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/GBMA21979535.
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 0x880a451ad8f6d29daf696613a6efe607ad415d9e1865feeede5d774b297e7217. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBMA21979558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24da7dd2e432a7d27aa99076eaa688a07f583e50750b0653479478223eed998. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBMA21981071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290552e63b9ac390fa1a3c3ceb019a764d441cc7bd0d412395c877d219ddf44b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBMA21981074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd567a105931c46e119a34044afb4fe4380d3697e6d46aaf76c9e40cf9f99bb. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBMA21981075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de1d31e1ace68e37c6a89b8f1012b949b1e6802b095cce9031554b1286ef959. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBMA21981077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc7b76d74057f068289a7d1928d1b7959e8cdd273015bb3eb22d397a0a8c843. 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/GBMA21981081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a98b364407f4a4edcd0aeab2b19a49b1f16d51fa7b24c42e9d51fafa2bbe201. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBMA21981085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f8bd00d6ca5e3bb47877dfef3cd37e16e064e1336917a144a5b07ae6ba6220. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBMA21981086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cce2e17d9a89d97c4c3375f089edcef0229f257355b8229f83151deb8eec7f7. 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/USHM82137094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadba37f5d8f08d365220e2d6139a39f61d291e2fd85077fba6e832ab8daf954. 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/USHM82137095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4259d36ea92336b698d5d11870dda489556817680e3fc151b37ec3af076c0934. 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/USHM82137098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb2d3ec8ce878cf2c02c6b33a43fd0a7e987c88c0fbda16d6cab7f81365cb9a. 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/USHM82137100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a081e90c89c7e827032e46ed56f379a016178d319904143bb4d5167069bb8a. 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/USHM82137102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3597c0034de2537ba831a7c7465c33ac5eea1068171cd377d3a617ed876018. 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/USHM82137104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28998a712054b83cea91a055a4866ca107239521aa5ebb32c0bffd2e394284b4. 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/USHM82137106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb9085e5499ab63f528e3655f18e20d4d3f845ae4dc8f7a443c6f9c56458acc. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USHM82137091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8538d3447ca833c0799fe08ded6876879a0746d4701547131345dbff01782d7. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USHM82137092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbacad2c8243029549691c5c717fb2cf00ce936fb3e184570f4371705243a7c. 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/USHM82137093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446e3e8164dbe0c97706e5616b5cefdfad96d57028c8f803c980095367e0f02f. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USHM82137096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43fdf68a96c95cd161641a41a43109c56d1fb2bb79fe6ba31d832481e98dfc1. 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/USHM82137099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fee4bc6b1c6a221474106806ffad4cb2e22f961450864edad07eff48495786. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USHM82137101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18202cace73dbe140131190f2033337764b42654746d1c7595bcb98dfd7de04. 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/QM6P41951130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0465d79373f0e2c232afe37e563e4f2ca3cd1c6c1a3cdfb7a754cd55eb0bb3. 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/USL4R2033940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb85267e49dc9ef9deaa7374392fea7a688b9fb74a14d6b088ed7bd27e5a4f2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZES62053663.