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 0xb76ccb7b456bbecbd11b1b337137cbe3a194b1e5fbff30b8a58070082b8d88dc. 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/7091d05e-e514-4630-8a19-1d28e2fef7a4.json and https://artists.proofprofile.net/proofs/artist/7091d05e-e514-4630-8a19-1d28e2fef7a4.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 0x2975ba45d16221a8e368aabfb935a9a7f3e79906f12ea75596c90956a4cda911. 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/BC3PG2303613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92826d6da6750dfbe3122534eb4644a0d32810981ed0c6e304365d4bd181fecf. 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/BC3PG2305524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda29d4353001c214ae32f5a29d35054b72f34c7f682679261a73021763e64d0. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZ5AB2374624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850345e69dfe501d073938b2b2ded408e7bd7ba1d244d90179accf3f6d77fbfa. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/BC3PG2303272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d4c331844b22aa271fc01f5f55a96732663da1ab3cb9081a8a454b493d85ad. 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/BC3PG2303234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfeef4f6845be567f74367d3bd85a5f0a121570549354ada4eb85efc7f16bd08. 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/BC9112400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc85452d7c012a78921c4ad09327aad607cccf2bfbb495a665718e0c410c896. 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/BC9112400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad9960e1d67b22626cf21394f302c86c5e5aa1ae027d2d4a047aff5b2c65b1d. 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/BC9112400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168aaedb6d18c71d456b2bb3d0bc5738f6d4a1504d83b909db7c9e807796687b. 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/BC9112400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44ef059de8445cede5615e4d251d83d41497f78064966f34f180a9f0a21e31f. 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/BC9112400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20578922d90071de3e03c59865b575770c00853eb55e536bb27c171e98febeff. 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/BC9112400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd814251df85044b634f4108a02fda695df0b5ec94bc11297fc889a333a713fc1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BC9112400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa5a6bd220035f7a7938c6334ccbac1aa8c41f7cecba295612791ee7fa29934. 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/BC9112400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53383061601f9dbc2666adfe29dbb1033be08e6dcc678fbfee2cc4acf0c7d75a. 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/BC9112400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34e2f56aa287c2c1bb64c613d89495781333a4dc13c7e0a7984a3e76d9495c8. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BC9112400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9972dd21454519ae95d7f0690082d958431eb453f2b99956acbd14520aa9b34d. 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/BC9112400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6508b1016071cafc29df1f8266479f73d92030e37e0a401bf24d8c4914680b88. 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/BC9112400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e83fad1ec9f67b3c13e72896ab32e01d0a9ea60ad3b5b48a10ce9f8ac152232. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/ISRCB9112400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32711ca174c435b987f52ed29041bb54345f094ab868951083ef6f88bf7fb4ff. 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/BC3PG2304291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4585727b0b22a2fd23a2794555302e8439d6e71b19a36d75df77101228e6942. 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/BC3PG2304292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dd3212a3c167c5cda5104f574213485401d053aafc6bf2471752d5d5bf51d6. 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/BC3PG2304293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8938a7ba173c8543f07aaadd9ec240176cd7ca8986d2a9b17cd599b7e216c0. 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/BC3PG2304294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf565c123431599471fc985de5e3b33d3a6772c699211a3b42b37b2cb8d2fcf5d. 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/BC3PG2304295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e5c18e7a30765455f4a328f7c2bc6b3f184ee05dd782170850c0a5993791ee. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BC3PG2304296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b69bc77c22e2a0e602f14d93b95cc16d026e6f4008146149d0c9593ea30273c. 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/BC3PG2304297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd28fac141d152f14753d2d6aec1039b4233b32bf19fd87b0a5439661e57236. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/BC3PG2304298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd55b9b4fa5e10950627b66bb35832cefd9c209a4d7875a8b9e5c3e2d2a249b. 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/BXZKH2200276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7880772671c6f6ae2fab196d60ddd5df41b280847e2a761078ea66ca686673. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/BX4IU2312227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4160fc9951ad733cb7d4d36fede05fadc00ea06a224bc0b1d17d744bd7fe206e. 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/BX4IU2312232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c9f7e3d40fd538a951431b56a59137a3806318f9d67cbf072e72dccfc1575c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BC3PG2303698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6362c82b5e8d84e3d0785fc56deccd808f7ef1aa8bb2ba785311451fbe74a9b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZ5AB2383943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d90d5c2a98dbb74ede09f541d7179cee102ca89be1a5e04a2d6ae6a48481dfe. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BXZKH2200580.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b956892c8ca0bbe6be2d497312c22cf32c544324436cd63db27959bc25b529. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BCJT12308203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60097db12dc31389b1835e58c0c7418b6b7cfc018b2c825e578c3728685d845. 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/QZNJW2386884.