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 0xb443966ece1e1890171452db63c4486690b17fc101fd665fbbff0cf1fcc7e640. 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/9211f356-79af-4b82-b36d-2026817715e3.json and https://artists.proofprofile.net/proofs/artist/9211f356-79af-4b82-b36d-2026817715e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Los Ayer's De Hoy Interpretan A Los Cuyos De Ayer
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 0xf18c74e90f84e87363de9e767253eb22113c5afd07cd74a40fa00973d046f54f. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/COS019900235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2119daffa2393f47ff5f1243e24595ff98b95af769d611e251ec6279098848b8. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/COS019900223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3780aab97348d12fbbec565d494bfb99b2a314c4de0ef0a6fbadd6521d921b. 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/COS019900244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df29381f5d28f701141fe8d6297927264f6c67c016bf5d0eb23387d80b90bd6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/COS019900236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e483935b99c313b713c9df995613b41e825f5541a1efca12ccbae12034b6e0b. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZ5AB1760513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43244848233b0f872fe32d228387fb6d767e06355b1aa0fba7e169036a435319. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ESA011962246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1743ee4b79ea66b605c16986d8b449388d48b6ef8a2353d7e93e81b8585639e4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ESA011962298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f59e497349f586aa94157e43e83bd8a27adebbb37b7bf1a537bf86f538a8863. 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/ESA011962362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad3fd379543f9fb196158605f7bcd6602b08a7bb81b42693c5fb5ed7b05455d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ESA011962354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1743ee4b79ea66b605c16986d8b449388d48b6ef8a2353d7e93e81b8585639e4. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/ESA011962298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc9a0d62825eff0d18374158680f458e107f86b86629b58f22d9053cd8321b8. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/ESA011962259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2a3e8bb4b15130e635cc16ba9afe02adf4d91576cd8c0a1d84f1ac95408c69. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ESA011962268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b4784a79c00efaf47a644281cce2795c52011b68ed297f440e5d2afbd9b6de. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ESA011962297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9f1495a1a6d9a678bcfe4b85332f10739cee0fbcd124df99f45ecdf8cc1beb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM6P41556901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80cada36d35fb361ce7c4ac3ad64a891b4d52544c8ee881601fbd3224e56ed2. 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/QMDA61590465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ad221d063576c393dbf14579f17fc6f1545a52249e697d4a4093371cdddeed. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QMDA61590478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77269c37c92286ba1e461bb26fad022acd07ea68fde08b1dea10afefdc18a20a. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QMDA61590484.