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 0xddfd30d7db7399cfecfc86631e26ef156f7896ab3070a4e5631c49414db001e3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5b05958-3ab9-47c3-b638-7948e2e0ea55.json and https://artists.proofprofile.net/proofs/artist/c5b05958-3ab9-47c3-b638-7948e2e0ea55.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 0x1c4c785f903a0d30bfe7bbf7095598475a941b2e0a80682bb60275b5d56d8d7f. 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/DKGK51901301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77c7c032e9657848b7efc3b0abe846107b2ac065fbc927424cdd4f37c00da16. 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/QMDA72192014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb345db760984ff744db521944cc6e97f0ae68f3f39deb7a76db39a20deea48. 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/NL4VT2100320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660b386ea4652e14b884c98b93f980217bff3e4248300898961fa53afacaf788. 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/NL4VT2100321.
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 0xccc9b2a86d77ee8024e84f25ab8ce1d577d1c8fb83d8efa8bc7c491d59d3b7c8. 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/QM6MZ2254010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84aab7e628d9973eb1f5c7259da6f385b0cae3e7e660d1e107d4587d68a8c8cb. 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/DK4YA2400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6001310997c566a854fa8703fe76d30c30f1209d3c8874ca681ca6124fe27c46. 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/DK4YA2300601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06df36d136b50694ec4a94bcff8c9d85b547b971e342c1b549c2b147e33bbfea. 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/QM4TX2249283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8b592e509a0e96dfbf7207e36b4a9fba7f8c979e39ef246ecdc747ae9b8796. 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/QM4TW2295027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7777c2fbc350400cad635ec3682d7a83eac151ec8fb7d2b9987f0eb3105536cb. 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/NL1ZN2000491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505bcac021336dedbcc9a3284028c6f3bbf44378f287b544afd56906cfd4e955. 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/UKRPL1900778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb5a3f86ba15cb84e47dcac0694d8ba53e3cd2520b3d9b73900f28898464bb1. 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/GBKQU2420535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4ace926fdb77bc2b64b985787d0102bd112e391ed36d55cb24ac3373252837. 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/NLT2H2301029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc361e51636cc43c25b689bd5542df92da2fab2c699f9e448aa4289e1b2086a54. 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/UKRPL1900526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0b3a05028d2edb4d4b403da9ac1fd2353c4e5e208bc63fb21f466e31c26cc0. 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/DEXW62300190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f256e9e01cd29a3bbbca28edcf7b3d258f5f3412490c2f4be2d8d2f0e2f32e4. 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/NLZ542201923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f020702025b83d762c120df60414ce3cfba9107bfe90da20b030f0a171b841. 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/GBKQU2265871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15591ccb4831045fd22f2e627b02710e9f94b821abc47e75e976dd915355584. 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/NLT2H2200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f237c386b34424831222fe32d77d0855cd0da4fa907e5b8613e5281dcaab387. 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/AUVC02137610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77164cbe1538e2576668ab21a3f917e4d054d3dca39d131fe620beebc1cd27d3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLZ542101675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a4e8b446e261128269480e2e10894a3ee702d4db7644fa3a1626842c566b85. 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/USUS12000737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3569c0358d4fa3aa6699960239132a66118a6f4f86259f95abf31327a168967. 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/GB2LD1900087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761a778b7a2ad8531a34a356cde15d08dbe66bae20b72dbecf4321f1e05092bb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DK4YA1818301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f9900754c1666ead962b5024fc9280ed270c08bc03e2f7282f4d9cf0fa96db. 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/CA7C61800149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b506f1f06c44e385fa87a1fc37bc4b661eceb0a68484c952f708b818f357606. 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/DK92A1202504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122cfa306f3811a4cea6642ae36b826202bc781afa43806c0fd94023c79b05bb. 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/DKPS91100201.