thumb|upright|Velázquez with Pedro Vargas, s Consuelo Velázquez Torres (August 21, 1916, in Ciudad Guzmán, Jalisco – January 22, 2005, Mexico City), also popularly known as Consuelito Velázquez, was a
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 0x11b5830fffe893f225c59dbe6eaf0739bdaee507fdc5b54fe2b0b48f4284a7b4. 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/d8625a6c-ccc6-4556-9c55-c8313a6baf13.json and https://artists.proofprofile.net/proofs/artist/d8625a6c-ccc6-4556-9c55-c8313a6baf13.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x9146c919eaaef9a5cfa09338cac69bbd1405b64fb0b857657baa854a551cc7dc. 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/GBPFW1100647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fc0318a7b5ad782845e1a36b341d90f9e83862b32c8f50cede51ff76f8e728. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITZ040500133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fc0318a7b5ad782845e1a36b341d90f9e83862b32c8f50cede51ff76f8e728. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ITZ040500133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b5a10ccba4d9ea429c6d4d23ff7acd2250bb59a6e9f6fd636ccec8f3f5bea4. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/MX2831300164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf591d89adc65027ce68101abd055e22650787606fce0704b7cd9cf33a877a796. 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/CH6541955516.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2642420135224d8f7c35f47c8b038291b3531cd00443a6614639d4953104503e. 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/FRUM71001855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2642420135224d8f7c35f47c8b038291b3531cd00443a6614639d4953104503e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRUM71001855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339391d860d56312755ea3a4f2f70a0f5c2b4bc0d6dad58b3ed105f322068352. 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/USSM11203793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc1263841bcf3d4a3adc17e3a6054a901e944abd27279f5c4cc8deab85d4bfe. 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/GBF071300520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb347b3172155c0117082de1be317ff112cd9453ff0f003791c3eaa30e92655f5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/KRUM70800121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4912e8ee5cec83f51fffc4513a34801dc784c24b7f6b3c5dbe8ed2e8f38688a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/AU2DY2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01559ed6ac015bbdfaed38d899dc61f7ade7b992b2498d1de8b69beabcd65786. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/USSM10404606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2990e4c0821370cf0ba90cdc698cb967af53d7837064d3fb7e6d11638afdea26. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR1963005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f007b224bb940b1b7f692518c7f9aed8d4d10607db17eabf8fb8b5fdcfca9ff. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USSM18200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6895989435176cc4c9c7219526e4db6b156583e686dc9a21959b7bd480ca94. 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/USTE10317235.