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 0x44dea3122a046126bc1bc52f6087b20a80ebfb54ad3ba42949cd4b562fbb0d4a. 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/79baa5a0-f2f7-4b0a-8215-077d86b13031.json and https://artists.proofprofile.net/proofs/artist/79baa5a0-f2f7-4b0a-8215-077d86b13031.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 0x0de9281cdf693f892e609d431a8bbc7fdf56ef8ee5ad1f98effdae398e7741cd. 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/US38Y2307445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46910b6847b278e693851288e8adeaa0e96e8475d8b85b9856db3dfd47f6325. 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/US39N2310763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8014a4c070ec477763828968f9f58d3f80f80137c76aa6ac3b94fd40d6b5fb. 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/QZUCN2201705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34de4c5ff2587e4b87ec8a6f9f2ab0ff4334cd1fc85a157882e99807572acdd. 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/FXR752300326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb3d172ff928f2c80b29332306530d2c2e435cec60fd93b4254fc1a5b2a3200. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CH6542336408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f8767167b543d108993fc9cb05e9dc9640257ec02b0b6b3f6607bf594fee83. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CH6542336409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1076cdb28fb94b63f3ebd5462e111ce5121dcb88095e19e133e832d140063a37. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/CH6542336340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b20781aa0ea9949cfb848714633ca04532da45b80a089ee4f8ab5b64ef36d0. 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/QZHN42302845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8280137da8f198b6ebec8babe3ad52af8bc1ea0476775395febc72b607212c1. 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/GBLV62210632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6464127a3bc821ba69e13c12c3debbd546a89bb4ca273e6296db21cf4d3ab8ad. 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/GBLV62210633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4274b08fca170e5d7cabc59d576c4f4667c00d274d3ee7de74917a5e55e8e8. 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/GBLV62210635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517d0de1c6fb352200585a31dc8f276a89cfeb4e65e6b1b826ffad78ab0ade69. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/GBLV62210631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa752a83e80f487e1fd79fec4e162c018debdc9ec3668491dec4dc4772b22d88f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBLV62213374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8c6cdfffea63f3f92eed3f0398e3267efd34e8b2a074c5dc506dd5501532c3. 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/QZUCN2202275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa841a6e64ad8915925487e2657d42f9428fba2ba6a861d443e0eb54c59d5bfe0. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBKQU2427982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814275c000cfe4c4dbc1854638b0bc63a5c03bd94ff0d123825ae2f54d61f656. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/CH6542346988.