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 0x5197d2caa3e75f119e723d2e959d2ecf3bcfa05c4db6d5a60a29bffe826e9029. 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/865796df-1a9f-4df5-b0db-620a989d69ad.json and https://artists.proofprofile.net/proofs/artist/865796df-1a9f-4df5-b0db-620a989d69ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Angelo Pierattini y Las Calaveras Errantes
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 0x6d52de126cf5b0731cf45f5359abcd63dfb63129fbd97ed2ba9e53002e57b469. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ESAAI0256941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11603c70d9cdff91a0314fc44fb2fd177bfdcf70fdd99cee80c1ddc91d6a0ba8. 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/ES71G1409387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25454be2ed732fe2ef5f52a39e7c73f5e902efd6d58f56fb242c5511466a5916. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/ART0G1806676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ed55a2dfd96de2fa91bfb5830702a4d01dd9e7860f0e8781bfa66bc22c0929. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ART0G1808138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6a7bd9edc172dc3f9c253381b11a4ce90ce7daa2090f86dd7c0418941027ab. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/ES71G2124625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5626842772ef58ea24d99e8256add1dd8a6a494fc345578eebf4a07706a89960. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES71G2037949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c76b61cc353d36f20afb2e68919e7c0b0b943b9e2c9ca203f7231d1efa7c0be. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ART0G1806419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5baa6ee9589af4397db5db96fab8160922419cbaed415fba2ea1d15f2c35d43. 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/CLLH23603074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05e051211426bc577f0864a3091c89e64eaa29e93e416c2060720db92151e7f. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/CLLH23603076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5baa6ee9589af4397db5db96fab8160922419cbaed415fba2ea1d15f2c35d43. 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/CLLH23603074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f21e27d1c8a66537c8d2977f7629bddc99d3c2fe02327242598c64052c43f6. 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/CLLH23603077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7570ab3125f847da61816915734043c48193cc783ebbc2a000a1eee207ab3b3b. 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/CLLH23603078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86980fe0ad96155671b1f811fcac153efdcd85187673b13348cb6c811e917583. 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/CLLH23603079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06906cae8ca1df4eb3078c22aae742a5aa3d8e6081f89bffb3d6b627053275da. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/CLLH24603211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47246439f688dec7b0a003478f6438d52a11bda83525657d4b8134455cbd4232. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/CLLH24603212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44112a64907a0d981861c84ee93937216b058014d37cf1e587a137dfc1508006. 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/CLLH24603213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7bfae6d42519b103ad064ca5078c724a79cafe0d81bf945b6648d927f96182. 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/CLLH24603214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d567b8758e541b0cf540615b9d1bceaf1a5fa0b06e404e9435876aa79567932. 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/CLLH24603215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34d749940c54929cf62f9c5c76d6fa47ccea1fa65b6b9f904c4d7f04ccf9fd0. 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/CLLH24603216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5686fb78c0cb6536ed462b1b3bd2e096a1eaa7978546cba744806deed139876. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/CLLH24603217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39806ad96abe9d7accec84984776d5850baf377bb2c89b3a69f939ffe794cf8. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CLLH24603218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06486e0d5eddb5b24d8c62fc8e2b035e4ef0950b6c4903fc2cf5bd8ad9138b34. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/CLLH24603219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3c08a347285e40c27d3010eeeab49e9faabb1264d5e0dab5609fa27ef4f428. 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/CLLH25603322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a63473b14b13c0a770c3fbde82ae820392d95de01d503bdbe00faf101404467. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ARIXB2500283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9305779e95ed7a61d4f111fb99ecb644acd40dbc0c36d40c9d2a951d858264a8. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/CLLH25603401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47d78f2989257374f7f6ee9bd5951c63c776ab02cf407e0bedb215048e169d3. 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/ES71G2021195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea792201886b1f9e8335dbb4881101b1c32325891cc94cc6690bc0ba2ef6478. 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/CLLH23603150.