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 0xe49678247a5661b4305210cf6ae7c7644daab906df9cebbc5312ca06ca32936e. 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/6e814022-105f-48ef-b414-02390321b271.json and https://artists.proofprofile.net/proofs/artist/6e814022-105f-48ef-b414-02390321b271.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 0x3b8ff060e5bd44b9cdba46fafd818d3d1db86d37a297019558ec54c3ce54bac0. 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/QZ5FN2358890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6a137cf7f2feaa276164205a165e7f28e70571e6591eb0953a6d030ea52b59. 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/GBRKQ2319458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e3e82a5da30942998375841e8be66ce41441045296a438cf87088f991bd540. 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/AU8N01100152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb05b71709b885e6c8ac33ebd15447f16bdd76d3d789d3bdad2059688892e6bd. 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/QZZ8A2366255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7f98661e0bdfd1c433011b13fd8075f4fb15d041cb0a677be0143ed8bb69e2. 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/GBLV62315915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7cc87ba813ee8b927fd769e377588e120e6e247f3ad2528d324ace51b5a18f. 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/GBLV62315916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17aad5f97e26f637fee2a798675deb5e2ce6bfdac4804cefb09447199dca06d. 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/GBLV62315919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e8034b3f286d4957f470dfe0e44e179077dfbcd1ca345e0e012e2f6f3df99b. 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/GBLV62315935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe843217488ef7f951739edf737efa9e2f778416dd0f4d0c083b505573d19ce. 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/GBLV62315943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ad338a1c3b53f65e5a31074d8cd5524b6d4d708bb9b90d59eedd35fae1e32d. 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/GBLV62315920.
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 0xe8fbfaf1b207d874a21917cc2c9d1f9ffbe45f3b9ee61d02590b81ff10d5cbdf. 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/GBLV62315938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116f725f071fa00982520a3c0a3e4ba12067f178d6086271622d3ec3b47c4084. 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/SE53D2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a08d8edc08f966fba8d2e1bc1b2266c62e7a9969c8f9b0b3722cdae11a675c. 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/GBKQU2414478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d582db3ea29192ea476f513cd5bb6bcf162f93fc992bdf19abda91f6c6d05b. 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/QZZ8B2344754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8262b902d9244bf21e78891a9dc85e2a9abfc5b39938c20971b93378aa0c68e. 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/DEMA61906882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176179d307ed41679d8f7cc77c7b88efd016c9d41aa358bf1488e4310c25ea32. 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/DEMA61906883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb7c91fdbb913437e234a867757f023a1da35f8a9d0332d7b34027a79881cad. 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/CH7812362484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f99361ff30dfe9e8efc7a7a5ca51ad227cc20b06904e28d5ceccc2c50566c9. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/CH7812362485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a96cb493efff76a375973a6718eeb99586149166cd46da4f780d82ef4f7682b. 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/BEB682300571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fb47098519aa791806dcbedac31d3dbed2319258e8bda0b8c0ec8053a7d20d. 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/DEMA61906772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f0ac9b2b7379bfed4cdcb3771cea0eae2bd0e498103995cade7066e14413e0. 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/DEYZ62300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c48f734d2bd2bdd85069d0e31a4d2fcecb2e5e016d2512b999775f063c5c73. 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/GBKQU2330811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b62356b9bfe0e38579182de972b9188633683a85c3a0115ed6d14dfa1f9bfa. 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/GBKQU2317144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05c61de1201ff48cf89043760b10ac98bc421ddcec021d3a2bb974a14cc1c10. 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/DEAR42228718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a338809f5bf3ec19c105cf30179607fca6714ef735206ae952d09d86b85b765. 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/UKT6B2200342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77623fd9c053ad775515bea4eec6c1d187d966906c1377df7a600642f6ce749f. 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/DEYZ62200120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90567370a630a4e4adbed1d8646f25d5339eebd298f3e9c8cf0c9e5ec8d01639. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USA2P2237348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867f88948dcb499d44a531de35ddc80671d02400d4b47624280025ce87add540. 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/USA2P2222651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6852adee6d4814881f227930f6b27f79e590fd188ca470c8e9e583bf10bd14. 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/DEAR42298919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597885526527b1a2bee158f14d053e5d080976fd3d03e4c998fbf14836f14455. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/AU8N02100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61ac122d09cbe945b1c607e4b92762a3f34b97737579a9b8a8dc25d460b159d. 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/FR2X42206855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc452a9848b1c56afea366ad0a4d58501d61633aca6a13c2350fbb7c36193158f. 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/FR2X42206856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fa6d8cc9c6c3f49d7d73ed8332cc9a5fa65788d1f7c32e93e7b30a97d1694e. 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/DEMA61904560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfff4c17d1f9d99b117b800322c3fbbe8c8f86528d4e4e9bce618f8526fe631f. 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/DEAR42118570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d0bac8fc2109750bcacad747840358bf3580203ede5678dcff48c4ebc52fac. 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/DEAR42187311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbccf1df8ed0c13c66d7611a23e902b1548a0789cf64abec94dc4dc038d5215a. 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/AU8N02100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11909cba99a9f388d244a5ae9b1f75688200905c78329ec06a6eedf368e29c0c. 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/DEAR42188971.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf092ba8fd312928449f64b6e24a917fbede934865c28529e8f8f22c052d85041. 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/GBLV62209168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815cb67bff4733b15ebf894687d4f5a412916af636715f0000cfe38553d58ee2. 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/GBLV62209172.