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 0x8c7cd8e539fbe85f507bebe7df49f4302edb5cc5e9bfc01110ab9d817835066a. Chain 2 (Bitcoin): anchored in block 953820 (2026-06-15T18:35:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ffeb6d6c-f7e4-491b-8214-4e997d1c63b3.json and https://artists.proofprofile.net/proofs/artist/ffeb6d6c-f7e4-491b-8214-4e997d1c63b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ecos Do Mundo (Special Acoustic Version)
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 0x161015e06ef974498d7d0ca0e9837ba335ee7574f9231ef323f405544ea701b1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US7VG2530268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec93ca6eab7e75477a0038bf6dc3f3e1d29a1f4a36a14c2e7063a98080b4b18d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US7VG2530344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4956d8ba526276df78323d43662b178627bd7155817cef93261747b7718896c. 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/QZGLS2538284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6525a5735f2bb5a38427f2525c63574c051fe811515bf1801ca1dd5e664f2c40. 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/QZGLS2512499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65713922d1703a63f030b7ef07b3b71523df0ae9269e06d818bdf954e2d43c85. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZGLS2512488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3450a6f9c7d271577cc24f32a3d40321de76f3f11de8104a5eac14bc763502e2. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZGLS2512492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c455f1b744f086abfccc6a8194b27e95701d32bb29ce8b05f2041e1d6d6e6d. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZGLS2512486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9177ee879e1297a342716523d005d8412c869636ffc8e932290e7808e7d261d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZMZ92561381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4400a85b06ef5d0cbcc3317853745d715e38f53b10722565e1bf84317fe852ce. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZMZ92561382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc073272a594af0a1114d9a4a8d2306fb03511eb9269e5f274f7fedfdd6dca393. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZMZ92561385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0567ac50c39316712d344f712e61d6db76ac45b877ea27161dde376fd818bec0. 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/QZNJV2505010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd1bdb0fe8cb657c46a1f4ab8a13f5952a4ecf83f452c70970db6a1e5f7648a. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZNJY2578482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f4323df01234d8e94f66d8ed48e63c42a5f2623d826e6d8195bd0746ae4b21. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNJY2578484.