thumb|300px|The encounter with the conquerors with steel and horses shocked the Aztecs, so they confused the Spaniards with prophets from the east. thumb|300px|Traveler from Australia visiting a small
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 0xe342229c02b859295430a3fe69a4e9dec301c2439d27a53ed04ccc1c351bc22e. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54de68a5-1a13-4d3e-ba34-5f8ce95f9c7c.json and https://artists.proofprofile.net/proofs/artist/54de68a5-1a13-4d3e-ba34-5f8ce95f9c7c.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 0x1ce746e0a8843ff6160ea6809726233619b84036810a25b134a7ce12eb73aa6c. 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/QZS7J2120424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd32ee7f13092ac29cd14a5bb3056c7ce43995f43cf50d968d5660446a137d5. 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/QZS7J2144518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee19bcf12e6068d2f1c41039e38e8259bfa551889fce4447b51c890548fd907. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZS7J2183619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baf44f525f9a47b388b911f7857924dc7978e70ab395ab414201ab8b8ea6e21. 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/QZS7J2124203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5c6078fddbb7b814333d6428b0ace58a02977630156fb8ac4b59e7cd5fc0f8. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZS7J2182897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3c1b67a835d0106836f1306f27be78ae64ad1cd8ca62b9fd38311fb6ef9d68. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZS7J2146226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8785190189099a2f7270f07845cf44b37ed378c6938358d14fa5722c3482647e. 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/QZS7J2120446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60930177f7dea0a4059a3edb56c630a1ff3305aa03f090f15b1a6482786ec15e. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/QZS7J2106090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92ea974b76e61cfa8e028d9b444d20d190d3200c8914c0ca42667a5135a1056. 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/TCACP1648719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2123cefa775400371103d4f6360f3da95ff26a161447881a302544d85949dc3. 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/TCACP1648720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45153db387da52e6381b665e5899b5a6b357840fc08198b670bdbf4e9228050f. 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/TCACP1648721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd9d4d62383b03b03bf505535d5772393d557c3f94d5bb09ccd677667bb5186. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACP1648732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba2e65b589566feb7a60451d5c1d3da6c53946e7671daba3f7c68cdd1c78db5. 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/TCACP1648734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847e1e59cac96ebc7c87bf5bc3725901d6369078b4d4bd9780d5482514990b60. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TCACP1648736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d732d6a748851c701493eef3af5af68db4135c3085c7685356f92027e43ef5. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/TCACP1648737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49796f6abb4364d0a412e1798b9d26c24ed998c89f02adf29aabb881b348f1a7. 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/TCACP1648738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6931a1bb7de8669a8ef3116d71fd3a3c6db815cca1d74f98cc6d54d7b71c6b77. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/TCACP1648739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bdcc556798d8fd5ff1197c236a864501f3b231395b3a2c615675b08f9ec25e. 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/TCACP1648740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f290fb5636ef6ec80957f901196b0a0e5a7cae117d6b790631a86a91bfb30de. 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/GBRKQ2206711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8454749ece9cb1ed28da8a0d592beb68821910173975851b8f0558a7d5b891. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBRKQ2206789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbf231c765f222f0bdd1bceb121867f66604bd7d9afa2287293c6448fb04282. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/GBRKQ2206798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61d4924f5c730f2183937821dcad83647623ad05649053eb659ea59220209ae. 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/GBRKQ2207962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e50134b243f867e2cbdab5613092a5994a51f6a0d3489ff719dd72e0f79064. 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/GBRKQ2208875.