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 0x1cf9ddd2a205942ba8891bec84ead2bc60420557abe646dd89dc018e382ee804. 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/68b37d90-4e49-4ebc-9868-f6792bfa823d.json and https://artists.proofprofile.net/proofs/artist/68b37d90-4e49-4ebc-9868-f6792bfa823d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Martín Palmeri: Misa a Buenos Aires "Misatango" & Tango Gloria
Markuspassion: No. 21, Arie. Falsche Welt, dein schmeichelnd Küssen
Gott fähret auf mit Jauchzen, BWV 43: IX. Arie (Alt) - Ich sehe schon im Geist - Live
Bachkantate, BWV 43 - Gott fähret auf mit Jauchzen (Live)
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 0xfbd0ff1f826d7f933aea760724c3321cbdbf58b505edcc9fb139d5e96bdba15a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CH9212000025.
Trauerfestakt, BWV 198 "Laß, Fürstin, laß noch einen Strahl": IV. Rezitativ. "Der Glocken bebendes Getön" (Alt) - Live
Bachkantate, BWV 198 - Laß, Fürstin, laß noch einen Strahl (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9149c464fefc1b1239b652f5009b4e5f98ec05c60d4794b654fd95fe503e00bc. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/CH9211600004.
Trauerfestakt, BWV 198 "Laß, Fürstin, laß noch einen Strahl": V. Arie. "Wie starb die Heldin so vergnügt" (Alt) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aae663ff6754eeab4a69b3c5cd5c753b6fd7dac6ee074267f351d39fa4996af. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/CH9211600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf403062cb349955bcf5a1799068cfae5ba84e0e58dfcff8db841dca912e36f2a. 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/DEB201609202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c4983349ec101b166e0897bdc2f455134e9569db339c01df894bfa553b6efd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEB201609203.
Misa a Buenos Aires "Misatango": Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9ef5b834ef2ce619679d18ea2bb2ea4abd15ce0f0de2a28aeb02e2cc8c9de3. 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/DEB201609204.
Misa a Buenos Aires "Misatango": Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e5f1c2d78b1724d2067470e17bdedfededade78854970ccedd214763375953. 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/DEB201609205.
Misa a Buenos Aires "Misatango": Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad981304500ead84b3ed835ab17cce8e3f3c17b75844b09dd7b9da9d0fd5162. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DEB201609206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616e6f376331dd4d76dfdd65824ffcf5fc0c616dfd12d5fdb95667555bc690d9. 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/DEB201609209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96062bb6e35e8c53cac39f1a515037735113679e508d73133ce85eabdbd95a9. 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/DEB201609213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72abea2cd020ca228085ea3d07f501ab2911b4f8c1cba10bfc69de84f9beba8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEB201609214.