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 0xd0f57254189fc91c0b3eaf564681bfed8520e8ed9a8d585fed451ce09606368a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0fe5816-b41c-4a03-8475-9ef749afd979.json and https://artists.proofprofile.net/proofs/artist/d0fe5816-b41c-4a03-8475-9ef749afd979.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 0xba2bac1ec9c133a0e04a15a5595a4f74f895959e3f863a278e263bebca04451e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCACS1636881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043936298e166571992d65d8bffa1d44109a5f65a9d9368d6e356ac05e765cdb. 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/TCACS1636883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74959ede20865c836d09bd50dea7c81a934b45fb0e073de4db6664ed02113bc. 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/TCACS1636884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2478b81398be49cbc4c438477ce04713cc6feb28c363a266ff4a7f462c0ffa1. 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/TCACS1636885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3dabde6e6416220b859b47ffe622bdeaf7495f9f623847a41cff3c5f757991. 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/TCACS1636886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7428cd920c5b91b3bdce4f0b21d38dc14ed874c348ae685f2523ecc8485bb596. 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/TCACS1636894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df8867205e639b0fd43c26e45241d441acc5929c2b11932029bb03a0dedadf8. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZGLM1980635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6472081269d600ef842dc042512f910ea6dd99f376b92f4a8897891d8ab6aded. 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/QZHZ41958877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3c30619da90e80ec5ab7725a64500ec2ab37e0efab9c3795753319e7ba9280. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/US7VG2115472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303b09d20602a4428517083145f53e645268ca8a9e95bf16f13f1103d21216ef. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:10:05Z), 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/US7VG2190275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6472081269d600ef842dc042512f910ea6dd99f376b92f4a8897891d8ab6aded. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHZ41958877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea4af71ec7117e47f3eb1be5fa328aa228fe916148e60ade071916fa20de2ee. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:11:19Z), 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/US7VG2190270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2f266db92709aacf947b1be79d3694750cae92e28947e31d8f9230a09f491b. 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/TCADU1843104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f03da84dcb3f64062bb5280fe167be3ac3d0f5c7d3ceddad7e7be37247a8eeb. 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/QZNJY2135744.