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 0xe087b5081e88db4d645ad02623992b46028182907337461372878580fa84b3d2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e85ecbc5-5d0e-470c-8499-5bbd3b5f5cff.json and https://artists.proofprofile.net/proofs/artist/e85ecbc5-5d0e-470c-8499-5bbd3b5f5cff.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 0x7e38d8185cfe90bba2454b9f7d39513204c6ba4bb312e9833d0bc1d2073554cb. 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/USANG2280831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0995351edeeadbaf648038d32b52223a470985894b235d53db38ab128cb4a300. 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/USANG2280827.
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 0x539fff6db1db6fa0edb4967671c7186a09d21af2cfd4619b38765c126bd09276. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USANG2280828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19d9bd4d5b370663cfef8d0e33bd2e466fd6a686f0f6a9558487d6aa5760282. 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/USANG2280829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8c422abb4a551ecb5206718ba365b420c4bd09d98f1789a0a94c7a1029efad. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USANG2280832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e30ad10dc3b4dbad4eb0eb04498e415740b1fae02ab7cc046eb16c3df0c853. 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/QM3DF2499060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bfae787c2739b1dd54166c21b84f8330734be7e338577b14df802fcb913ce4. 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/USANG2439438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043343a5ddce458db75d043b9a5d19fc5ed7a5e6f2dc4b464d2b2b8124003921. 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/CAQOI2305762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33bfe1935dfc44005e8929b082215b2d567eed0f7495b7163d5853d1bf37f0e. 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/UKZGC2308588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f259b9b79d0e061e86901b4b7615cc89ad0d7e7f73b0e8120b986e5cf2e871. 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/UKZGC2308592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2eca7189bdc4c3a4816ce19eed8ba34cc2c9b54496cd7d0e27a8c09e9e76ce3. 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/UKZGC2308590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631b9f848527e6f91b75cdd29878c1307cea657ccb7c32a9b2b9324d03038d64. 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/UKZGC2308591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7deff773c460ffea250f0569fc4301d7bc1676b6f8b20dbb14e0089f87741ba. 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/USANG2280836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3a70433e5a0dbe95e25b01da2d7298a94c16cdb9558d9f11590d7f6b3cf828. 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/UKZGC2301977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc027c6b77402836d25aed518cc8fd8ed65fd268adeb83c7ce848aac3fd4e2859. 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/UKZGC2301978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c35c5fffef3efad726b685e91071039e11d85983c6dc4da825859ce4256a0a2. 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/UKZGC2301979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71b4e3494a0493b2a37c052e96b6318937c9ef19dba7113b6a899ddcc9f8011. 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/UKZGC2301980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975494270fd2c945fb51b600a2d571e119c0cf972b99c79f6592b6f54e063c6a. 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/UKZGC2301981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3134a089ab95115a4243cd819839b153cb1c815da2ccaf71b88db1593f32913b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:35:24Z), 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/USANG2267779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad07c7834638f0455cd0bcdd7cfd015e26a508466857df8a7a48acce4e41168. 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/US3DF2261751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a38510a60538a36016a5b1f0a9c0fbf67d2ee6b01b058b600e012b750b7990. 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/US3DF2271449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8296358ba9565eac95cc2927298efb66c042cb4395ff6b8b78ce3456d7ec20. 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/US3DF2271451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735b035210f73d7686faee1433800cabb912584b00db2173e587518bef2eb757. 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/US3DF2271446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2516f25e4515294682726b5a9b3f2a3d70fc20183c1b22a2e8a90af161095a0a. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/US3DF2271447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50b7490b5aba4cf7c9a6d9661189a18c81e595109cbdbcd49a7e953d6aa3518. 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/US3DF2271448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82389a1daa3b7a5d5c533b250f5279facf4c2e2f6b27a5970248707354424934. 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/US3DF2249326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5fc8613383a2279c6d4c64e9b59ea27112cb4784f3d83f528167c137142a4b. 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/US3DF2249122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb34e85434ebd5ab88ce5b590007a9c48a7906d890caa2184f8c2f17dd5cf308. 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/NL4YD2100372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa9a97323335f20579368ead3b240f82dc9cacb09dd4a28201c9f9c5d5e60f0. 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/NL4YD2100360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dafa38d1abe101fb980ea13cd85334601536eb11f13a272b1550fc4f62f0373. 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/TLREW2222016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa36ac7ef2078144219d6e88015d2bdfd2c6613859412dd3e0940c21a6d7df8. 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/US3DF2155501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc59d681ecb276c3e04f9b853c1eb8d53858c68e641b9b063967024dcd64352. 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/GBKQU2173489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91af40665ec0e21c2b1fb80260b7e86361b2805aeac8f501f48f138003199cd1. 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/GBKQU2173497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1c8c708fb2805d1417759b469eb8835e804c9192cf67692733daedd5cc6de1. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/QM3DF2120971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6db4a7015d49ad092cca16717e957ed4eaebd797269c5587272766697b8b63. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QM3DF2214274.