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 0x5c3fd74d44888c60e7ac2df8e2a999af8d9c61253a49bd87a76e05615bec4368. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fcf4a4d2-62ba-49c2-b8f3-799e8f98b2a2.json and https://artists.proofprofile.net/proofs/artist/fcf4a4d2-62ba-49c2-b8f3-799e8f98b2a2.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 0xbaa742ca15296306e526c6fea9f3d120d5d9e82f7e5a360bb951a75fd0a97943. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TR0171400938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32cd9697d77259ec9a92e9b9e1c92847b74b6a1c73a7b6642b89e2e07cdb2f4. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TR0171400947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b080396da18d5cf11784fb3081a23720fe7c4e1fce175e2c65fa8517f2ea159. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:15:47Z), 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/TR0171400949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d48c1c5488e24c22c5f096891c0128a6823cce9c693991d3666114f0d47d30. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TR0171501088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce24116b754189b121849cd14848033ed7aee48d61749136d01f208fe0b3bac. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:38:33Z), 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/TR0171701413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5fd043ba9e1abb7e0997df61c0aee249cc6412260b5d027e995c658a760387. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TR0171801553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8fe3b0198ad1912be2e78d27fd8eeb036a6f00b8ab45afa2b9cc09fe852f96. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TR0171801554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b70ab7b9acb836976311c0b08571001cd4ba3afcd043f1711a53defef1b42b. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:09:09Z), 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/TR0171801555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5b5c1de6334b06584e8e8ad5a081da60d5a5f5c602d290683fc496973f96a7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRX872288704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946eba7967867747a72b3e9bc6b9241c02b352227147bf86db14d5139becc182. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZWFP2443867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fa3deca55aebfb18e5c320f9f33d7525f97185a35a3e1dfcd796379c0e65a9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFP2443868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa735c6e4902a66662ae1cd2aa0cfa10d53c638a586d2fefb3f7c06277fa7f94e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZWFP2443869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cbabb947cbb519b13d03824eae737e166e0318b3b1ce9e65c508b1c57c3c7e. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/QZWFP2443870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5289f9982819e50ed2f6416493475793e0d90dffcf61c4298ed9c13b77d855d3. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFP2443871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8af5e3019a7e910efb614778b10182547ebe101b607cfb10d07e81dd4a3878e. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:10:52Z), 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/QZWFP2443876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24624ad16d72bd0643a884d11526edfb607e20b1045c89a918eb5a4567e1d89. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZWFR2430461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0810da5fb61c0a447e411ebe152f292897936e1ff0b8253473d3964b39e8e118. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFR2430462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f96eedfaa0f4d662061143f18bcf2c9bca3b7aa919881075d657c351ffe691. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFR2430463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2355508ad6071c1928500ef20e55968e25d1f103fc2035d98720f8a0c3a4597a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFR2430465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c2a0ccbf89d5f625a0a16637276bcc09d2ddebfe3084654f124c642fedec43. 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/QZWFR2430466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3da3653969a6a0894bae0999d3026d7debc6edb1fdfcbb2535c78916bc1df62. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZWFR2430470.