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 0x3e1628862d745de5989a10ba4ffc6d6c09902e391a9b21ad43c99a21c367950c. Chain 2 (Bitcoin): anchored in block 953973 (2026-06-16T16:37:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b30f84c-e96d-40fc-98b7-7bacdc2773ed.json and https://artists.proofprofile.net/proofs/artist/2b30f84c-e96d-40fc-98b7-7bacdc2773ed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Binding of Isaac Revelations - Chapter 2 (Tomb)
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 0x6be260335303dc8d96db18632a78a13c24dfed5f9d1c072a81fd5f1da89f829e. 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/TCAGI2242144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c897947a183bb5a72d4071c9a23822a75425ed16321ed73257ee0522dda7ec. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM8DG1894595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59154b647c535a7245e5c86c125749691bc85c16dad80d66d8fa9c3b6c02d3c4. 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/TCAGI2242180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e537535a934580b5eb89ee5bc07c97a1870332b65333c9e5cb25e6cafc3c093. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QM8DG1894598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679a44c99002d3fd6e30f171ae78f498e6315ecc95f0f0099fe4c9a5e2e13e2d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM8DG1894594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac6acf3999aae1e498bb4daa0b6a0992e8931d437ebd3cce092a867b097b69a. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QM8DG1894596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bd8124c568f3bbcfd35234840b67b65e9860d62123c81cae552a6d88ed1b60. 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/QM8DG1894605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b16a4f0cb98261b48b706fcddaf39be6ee1fda14c33d974900d47118f95eb2a. 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/QM8DG1894656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5b9225ce4092b93cf51e009e8a4cb66c4dca18642f872143923aaae9ecb2d4. 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/QM8DG1894654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e7d8b711aea4b3676d97ebc1a0096957b0fb95ff8653edb081123aff63c2eb. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QM8DG1894599.
Binding of Isaac Revelations - Chapter 1 (Glacier)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec8d6154f412e275759a2558edf66632b69b5bdba9195f75d1ff9ceda795ab9. 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/QM8DG1894643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db69e803d071c7dab98b652b9167065adef2d260660b471107344048fbbf70f. 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/TCAGI2241934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b29d0e303cd786ab3cb2f4b2181f0e3ba9088102a301cb9e4591183e65bfbfe. 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/QM8DG1894642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cd1d7cd9b6bf9f072beebdba19537bf3c2593af762576989db44fdc1ed51a3. 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/QM8DG1894641.
The End of the Beginning (Glacier Boss Theme)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873bcacef0c9e0c7b46853d2174d3fcef4358a30542f5c0cbdc011636ab63a25. 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/QZF8N1820870.
Mirror Mirror on the Floor (Narcissus Theme)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a54f0d9c5c6733de45146a81c58db34c20ec705bb4585841b52a83da4783c7. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM8DG1894604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8711ed48e0bf4b84e523c5a4aa7b5159829b7817a9f47a825b6bbeb99ef1ce45. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QM8DG1894644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a17942819ec2b194ba3c98fa5bda028b0da009b4b43947d358bef72cbcb55d0. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM8DG1894659.