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 0x4dcf52776d3525e062338a14f5b7fda56a62cbac7ca67b59392113b2f9975ebf. 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/9ef46ee5-ebe1-4755-abca-4bba447c9df3.json and https://artists.proofprofile.net/proofs/artist/9ef46ee5-ebe1-4755-abca-4bba447c9df3.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 0x647de32c5477d951a8414317cea3f1f31855cc9a39d2decb9e11fc82c548c3f0. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USCGJ1947825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3f6080d078ef413e2448f3795205b728316aa92a418f34c33f28b118cc0154. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/USL4R2027539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d43a3428110cde7c6ef3c372adcc5eca5aa5573caa7e31ce8ebd853d4f9f478. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/USL4R2027540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0053e725a456b3b6ad16eb2cd8f6a267fb901f07acd1d8afef12143fbdcc9d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USL4R2027541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaacec2e8cb8a91da399c643c64ed1d2dfe57c6695fb5a1d7170c22652af681c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USL4R2027542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59cea8307db47701550b4707ec0c79993505e43b8f90285e7debc07df707131. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USL4R2027544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e694cf7d6abf5d6b5b78f1efae0c34b26cabced7f9b0f902032a9a3f7b88ce. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USL4R1901266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c25c347aec5ed57f0839efbbda39fe7741c0a3e79b687eba4c13d03ee564b31. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:35:41Z), 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/USHM82104498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde4db2e5f3e07887a9f11017b1dc9e71f940dd1671f133aa96fa0643c740a9c. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:05:09Z), 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/USHM92157328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129588b1b22227e964e80caecc73d7e33c90482f71f9056bd23be829faaa745c. 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/USDY42238079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed59b647825686abba00777d5c57f707d7027d2ae02e5212bc4cfa4b257cd2a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USL4R2151382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c25c347aec5ed57f0839efbbda39fe7741c0a3e79b687eba4c13d03ee564b31. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:07:27Z), 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/USHM82104498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948cd70b9e87b45316add80f5d33d2c3cc605dbafef28665fc1dd6f7f5931ca0. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/USL4R2238185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319069ea8f2177b1485878e6006c93496e63841e50820cc45d790d874383c389. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/USL4R2238186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fbba888fae7f82df42e7c04499a58799ec49dd2d7d10f68f67314e08253352. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:53:56Z), 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/USL4R2238187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1be8dd15ab1d8a606273cb0e9ac928a2f2cac6431ae3747e2925dc89b0974b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USL4R2238188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64162d4b52b3c654f04683b3d1169ea494545293002577d86dcd40cf22dc075d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USL4R2238189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6aa9e882b127109918ff3ac1812ceda78d9e2302b0386c7665bf376c4b19eb. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:27:14Z), 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/USL4R2238190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c33f8472c156b644dbe359dac54ffc28130594fd9350d81f9263e4d7caf295. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USDY42492102.