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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791e8c19060efa3cf27645324f2e815a09e5c11b57f3544202413d885c8ca3d1. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b633697-7076-4a75-9f7f-e03a3238c11c.json and https://artists.proofprofile.net/proofs/artist/1b633697-7076-4a75-9f7f-e03a3238c11c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Martín Palmeri: Misa a Buenos Aires "Misatango" & Tango Gloria
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6a55f703f448be6595283c96a79a6573f56bf6a4673f28dd0a832effb3dc8a. 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/DEB201609201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf403062cb349955bcf5a1799068cfae5ba84e0e58dfcff8db841dca912e36f2a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/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 956349 (2026-07-02T11:34:59Z), 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/DEB201609205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616e6f376331dd4d76dfdd65824ffcf5fc0c616dfd12d5fdb95667555bc690d9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEB201609209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96062bb6e35e8c53cac39f1a515037735113679e508d73133ce85eabdbd95a9. 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/DEB201609213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e0ddc3b518be43383f3e7ef5ae5579b5d39e8c46ed022884cfcc09bdc492bd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEB201609218.
Misa a Buenos Aires "Misatango": Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad981304500ead84b3ed835ab17cce8e3f3c17b75844b09dd7b9da9d0fd5162. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:39:49Z), 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.
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 0xec36f8e1fa1a16e840a8e394e1a69a9e21e7d8ef9ce12624dcb9e6030f9b30e7. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DEB201609207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17034f6eef8a58ddbbad9dc1b213edb3127154fc499ce7f4e57213fa5de89ca5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEB201609208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea39895ef2469bf5f3289603f35c2261ceb7c53624981ba60212f39119d2885. 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/DEB201609210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d30565f3befa1df0c5fb48dc98b608deccc735eeb899508ab92afd0ef340f7. 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/DEB201609211.
Tango Gloria: Domine Deus, rex coelestis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff59e21278d9c4146221782297b7cd8cb90a77e275913635b9ec87d0edd156f3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEB201609212.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9753f938d16f36a3ed4aeaca47ce4c3760c5b599422458d3c6e662aade3f95. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/DEB201609215.
Tango Gloria: Qui sedes ad dexteram patris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123c7a2e5d55ab1d49a0d63ef936d97a59a08c0199d75f0ec82bcdc27877c4a5. 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/DEB201609216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6f006ec5dc2e47b589ab10ab13ebfa961118ae1a3de6e5a43f1f0138b29029. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEB201609217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce2eae445b859ef112e0b23a4543b5e91d35b3939643d5ae2d8e2f310439dd2. 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/DESJ81800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9659ef31f1dc27b5f6784f7939a8cb00a9fff0ae32aa7757b4e9f93a52bc2757. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DESJ81800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963609388da04cf48b25307f845a5e2f60000338b6bceade76f3b58de689f40c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DESJ81800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049dd9f3500c97be7f047e97975b26540547717e2d68fd28a5fb0b655cd5b32e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DESJ81800038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79aa1856e1347463a726a42bdb47c4bbf8cbff8a14180b087b8158a949bde541. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DESJ81800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2aeb23bc52d722d27702a72dd5af91c97c87f0e16925b911c39183521d5a50. 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/DESJ81800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3457bfcff5d49e41c1abb93c7cbd6a4c0f8ab6b5183d2c9599fa0a4b3ffa6c0f. 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/DESJ81800034.
Hommage à Astor Piazzolla (Live in Berlin)