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 0x1a181ca9562c39f0d4221a017782fe5b40fbc277d3cdc0fadbca711b2da78c27. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e427d1f0-3711-4ec5-9513-7f4ff329413d.json and https://artists.proofprofile.net/proofs/artist/e427d1f0-3711-4ec5-9513-7f4ff329413d.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 0x7eddd8d7e535d001808af4f860865210c6e815252530e8c20395d453db2cec3d. 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/ES71G1802679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedace09adee8bc08ddd2da93cc07bda84951ee956fadbcc08978c48ba138a09b. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/ES71G1802680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7199eab35df89ebffe13ddaa349014f3aca2e073433d85a60c657c526c96027. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ES71G1802683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d752d9661baae7bfb9b2bd221a085b8f3aa4dee6e6d4172e021d7846c68a9dc. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/ES71G1802684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6448b813bfd2a919db7339bddcc7fd35f9159e589a5bb1176b68fe3510fc4475. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ES71G1802689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d7fc5670c6ad5d6a0cec7eca81f0aa6a59683ba13074d2798f236a0ae83ff0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ES71G1859178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff29d383c8dd8763b36d0da3be7df370aac2212c15f606b45b6bfee704e1cd50. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/ES71G1859177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcaebbe403bb92c59e2d98a3bd3a4d04ecb15f981bfd1a4b316a1fc1fee67dc. 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/QM4TX1543417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4a8a366109650e2b7908692e7e26b7c98cb668d7837371e7c9f79f6c374cb6. 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/QM4TX1543418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5280f199f659dc56a6a1b25156aadef0e2363e8cebcfbf0502a963e1bf10e7a2. 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/QM4TX1705738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806bbdddaeea4006abde3fb09d2897822f3c90fb11934d7b63b9adf878a8537f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QM4TX1543419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211896069033e19892522d3537d2e82e6ec1f1dce68dd482470ab4ffe41c17f8. 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/QM4TX1543423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6416c9a60ec19ca862c94d0f8b8319a8619b1f68a58f8baf6a67116a0964739. 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/QM4TX1543424.
Se Aleja el Horizonte (Maquetas Confinadas)