thumb|A ring torus with a selection of circles on its surface thumb|As the distance from the axis of revolution decreases, the ring torus becomes a horn torus, then a spindle torus, and finally degene
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 0x198db9fab22fa18695470252ee6df2663b86b080fae9f4a1540f4e906537436d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34aadb22-0b64-4dc9-b8ed-83518c61d4f7.json and https://artists.proofprofile.net/proofs/artist/34aadb22-0b64-4dc9-b8ed-83518c61d4f7.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 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 0x4a42f4ae6a777eb637007f29d146c016524e906a724c6a939d546d170324ac93. 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/QZTB42270358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffe5e1906985a71dfe67883da3d627982530f3106ccbd21075f3cfac56e50b2. 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/QZTB42270359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb413f1146e9341e657d8f0f51d4062384ab1f546a0695dbbdf9cdc50bcefe4e2. 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/QZTB42270360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f815c332c74fc1774b081dfd818045a0078548e443519376f2df4237089eeb5. 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/QZTB42270361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7ddee60d888230a33d9b7ecb7532caea7ecdbb6ec697f74f85f9ba0d2cb958. 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/QZTB42270362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd022108eb99528ad2e77790d4f86d77bb2907a979ad74562a4c09be0c428476b. 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/QZTB42270363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4063300de4e8c88f09811541e6b360895f59110feec497b583479f93841bf7be. 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/QZTB42270364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccae12e17e7507f617cf5b50ad1ab855cd03c164bb82b1cab21a5fb1163a9e3. 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/QZTB42270365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824d7f7d2fc3f3d4bafffdebec6f67e8fef73bf0d8eed96efd3c4b908a9ac5cd. 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/QZTB42270366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722c7cff9f4c49b1012bdcb5c2e838d659b2934c8aa5931edad4bec4ab33f7f4. 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/QZTB42270367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2cca365360cc61a3367dc08b3e8036ea5191ede980ea94ed359bc3d76bf4b4. 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/QZTB42270368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951a9bc3e91a5b31aee3c08acf0c9cbbffb944df8dbc6ff6fca3ca15d9458d6c. 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/QZTB42270369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb430ad5ae1281976632150c56a0c98482bd7b84cf89e8d0694afc55e90d7078a. 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/NLL562008794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef103e8e2f3d7dc97c3010998c604be64286b84b4268a653aa5c64d5925b6d1. 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/NLL562008795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe770082561ba668ecd4ad8bcdb3fb1c8a3edd39eb5eda2df9a36376626b952a. 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/NLL562008796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d9d50aea9d609a11032ecaf7f76b96b85e338c993de201f21a022702aa5cee. 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/NLL562008797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e48b1a1e8b8caf97ac7514244bb534386ee5e2c2f5dc689932501aced23fe8. 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/NLL562008800.
Music for the Gierboys to get on the stage
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cbd43c1c38f5af454873c72989e6b3b49afc969eabcc160bc2bf8e98a5a873. 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/QZTBF2302120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6db07dd1e2397375df34a8585af0f2ab30aa0c215e29337f69e9ec7a2729c80. 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/CBAUX2302322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca0168ac05101aeaf5df4f5ef2b3d54721a6450a23b5240834a53e476d722ab. 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/DEF272133301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896739190ca34223ae010b2f95908d4a6574e3a838b15ca5f4da2ad809714d0d. 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/DEF272133302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a412b2c3793c130df9e42a4cea9ff01db6e45cc2dd1d08806181444302a4de2. 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/DEF272133304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4405e431a5de029cd89e6dba3772aef1754588486a6c703d7fbfdb5774c92e3b. 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/GB9E51300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0a57f97e271a339460c59e78fbbaa78c4922a3ae4b48598cbdbe8c3644b1b3. 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/FRS182044446.