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 0xb21cb00f5bf57f57ef6b340ca50c0102080fad37224d14177242ce62707f2d68. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90511160-ef11-4213-a7c6-5a3e633629dc.json and https://artists.proofprofile.net/proofs/artist/90511160-ef11-4213-a7c6-5a3e633629dc.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 0xc3cbc6db87f341c6eb35bc39eb799fa1dc43885bac66d8a20c30463360280a9b. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/INK602105786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d485c4f92c85939f0b75d5a72333d86fe21d87da1cd65bab6e62dd9c0e04313. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/INK602105787.
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 0x815d43d769755152aee64516190c5229d93e6245608c3bb4d04eac6a65063882. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/INK602105788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d3ba8038481df41209a8511773a3bc8a4efe78158460e5610b84cc295c3294. 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/INK602105789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b5c8994843acee751e4323af830820f1ca3d299fcb0cd42fbb76af4eca5507. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/INK602105790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cde0ca88743efd7fddb2d782eb2c3299306896396704da8773ca35bf103432f. 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/INK602105791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e79d5d49b8709fa957e0b10ad16202bca740553f4753c22b0da387dbd9b51c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/INK602105792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e65ccac25716692edac2281a75fde27f347ac84b909b17f824992eb1001a3a. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/INK602105793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad7436411b454130ffbd6a06ffa0b26321032b8d40d4cd410a4bbde42fba1e7. 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/INK602309558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90f3f815f1c42752eb39d1d75d315f490b8d6da39886e6f1280ae09c358fcd0. 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/INK602309559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eba25d1022d89017e6ff8d1bf09fe2c510b1178881a6ff9701055afadc1600f. 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/INK602309561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f4e0e1d6a20d746fd511e3c0c585d85eda4bafca7fea8713e6a4f1d4d276f4. 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/INK602309562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643e1af291c0560bcac4fe5721c227d4bbd4f17443dbff4daf8f2d648f0d1de0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/INK602309563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111281fe767b5006c92c4398e77781ad0c3d0978bb44a41b1e26fd18ed162d02. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/INK602309560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb0c1dd8a446fe825af22d82546d74449979b230700f78927c4e89f71bfc343. 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/INK602206236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f603b0fd39ab52f7b474bc3e5347638f3a8f67df09ad0f7167438ca6e349515. 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/INK602204641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebb709a461612835dad30eba8d16ab04207b3e9b148744b7b2eecf01a70c0e1. 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/INK602204642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c989ee5454027085e02ef133cc9d24600c089420104ed6a28c347d010e88f1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:52:55Z), 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/INK602204643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6999d9e06da0752bfcb3b52330fd8c9d1abb0a332782ffb3620a34a8d562d691. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/INK602204644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edf1c26f69a4cc2830685d8a070d05dd0df6b585f6fd8887b3004e8ab4c1981. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/INK602204645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf843dae7313af1d0b1fea2e8855e6f764f79a3f02b6968b73bcebbee16f24e4. 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/INK602203899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4e51ad5dd011dc16ad3bc31475ac820bb9e238f3c0071ba4c457b7b56537fb. 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/INK602203898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6214ee1f0ecdbe902d8a5d850416125352a1d15ff795a286a263b6d6abc6bd. 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/INK602203901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5592b661a3d0998fd6dafc887491b542c9d760b4fe3a58fc789c1c2a969cba6b. 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/INK602203900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca71679ed7051c4fb504df7ec3f821cba4110e2cce3d0ce72f8c0a4d7be406e. 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/INK602202878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0049e95bf70cfda98908f920e9e50fd4da0abb6a26ad594dd3a07f12c531934b. 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/FRX282226774.