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 0xcc66c383f7d7fa2628ccd093a2fbe3ed0af25d2295d8aaecda20e20d57916b57. Chain 2 (Bitcoin): anchored in block 953627 (2026-06-14T11:43:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f6f8277-7822-4850-bc61-acadc99c2a2e.json and https://artists.proofprofile.net/proofs/artist/2f6f8277-7822-4850-bc61-acadc99c2a2e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Doña Jovita - Discografía Completa Vol.1
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 0xe63f95ad4742306131feb0691ea2500139e0e71e6b8c0a824c602fb24622eacb. 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/ARF039401148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f28a149a784425fc45833c2199ee1d0a576bbae80241b7f1fed18eed44cd6e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/ARF039401150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a9efd563cdadf4b025c71e003251d312127254a7b6962fe6d076536feda1a0. 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/ARF039401151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a055955fe5e4c1a9025bacd930117959f546d83b8164e1dbebe7952eb068f6. 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/ARF039401145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c393771cb66f726005e253fbae8e6daabf7e849c00ed218213e53ef15a4fea. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/ARF039401149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da5115cc7c6c98cf363584dbbf40f866e81bfdaa71f7df085cf5864e27fb868. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ARF039500329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e108ff41fc6693eabd2b53c3bc3b79848cc9890b1dd3871f2541c6ebd1c69f1. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ARF039500331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134213aaacd566157f153546d990f372d378b6f5d0f578b727553a08db1ce71e. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/ARF039500333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fcc093572d6ca51836cd7a394e44b3de593f3ff00e328c8ebe61ac9618a20f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/ARF039500334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e00c3b4db6ce96c88cf7d47a4f7b8e207c5b049ec45e2b5f7d6adc3a2cf05a. 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/ARF039500242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba804ad60b91f88d17d5954adab20731a7ad23b72befd54024117741196b55a0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ARF039500244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aca888f58d52e171418b153829533ee1a21ad7aaa56568b9127fadf257e1cf4. 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/ARF039500246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8ef0110cadcf46e873f2b9f497f24646ba5bc1d3fe991b209c1f8a3a1926bc. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/ARF039500249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dcc11da40f58b0db1e4b94a35d70736573be793b364ed67995b59eed06a68d. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/ARF039703587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d79920ea53a70fdb28d1eda331f3bf8a6b344e8cf025390aeaf39e42e390ef. 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/ARF039703588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64a65a82d290993544008933bf09c079cf841c6dc729b9b3e84d1665ca7146f. 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/ARF860700547.