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 0x5dd3458a0043af3427402b4057c9249ac231a67c5058da0951e808f48b0aabc2. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8dfcb82e-194e-4968-b1d0-74d8e3b6f475.json and https://artists.proofprofile.net/proofs/artist/8dfcb82e-194e-4968-b1d0-74d8e3b6f475.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Marco Albonetti Plays The Music of Piazzolla
Postcards from Italy - Italian Music for Film
Astor Place: El Tango De Astor Piazzolla
Morricone: Nuovo Cinema Paradiso: Looking for You
El choclo (Arr. Bonaventura for Saxophone, Bandoneón, & Strings): El choclo (Arr. Bonaventura for Saxophone, Bandoneón, & Strings)
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 0x07cf1b8616e046c2fad7a49485e3dca767f4cabd4885276b2b8ec6399ec11210. 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/GBLWD2202005.
Por una cabeza (Arr. Bonaventura for Saxophone, Bandoneón, & Strings): Por una cabeza (Arr. Bonaventura for Saxophone, Bandoneón, & Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b44c30c4084fe0ed0bbc759de14d75f49f1c71a9b5d3ce4a2ad0b4ef477b53d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBLWD2202002.
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 0xb4b14f1d3b4db12294b5346bfd05c71c3e4367a8a6d364e327ec5ecbb54ad467. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBLWD2202004.
Tango pour Claude (Orch. Galliano & Albonetti for Saxophone, Bandoneón, Piano, & Strings): Tango pour Claude (Orch. Galliano & Albonetti for Saxophone, Bandoneón, Piano, & Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f95061d13c4a72e2f2515c728c38ca202a27adf393d28e5295e05391368edb. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBLWD2202008.
Oblivion (Arr. for Saxophone & Orchestra by Pablo Ziegler)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3406ce54863a8a505ef5e68bd4122ee1b12e8ea0913440d6ca46c3479b8a3e. 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/GBLWD2101105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938b68613c353044b7190b1ca6e58aa8b08da631295a25d784999cb78e95407f. 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/GBLWD2305401.
Once Upon a Time in America: Deborah's Theme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16173c6d19dd51be4124f4771e3380f431e3409605b4591330a235b33ea8fe3e. 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/GBLWD2305406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381d2545a4c620f8a79cd091aacb8240340f7e72bdf0b72f6d3d0db59db8f7be. 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/GBLWD2305408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743b3666270af221bd21c219bebcbec02797e8ac3dbc1146b43a5ac64f2c099a. 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/GBLWD2305413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c38b106bf17aef8f699592a1f7dd799cdd4d3f60162ff3839cbbf092529e4a3. 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/GBLWD2305402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f07ad5648e434c3a2ba6e8c016f00134d1fa1d8dfb14a12504cbf749753dd8. 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/GBLWD2305403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d595850dc2902947de0e073bd4d092200d8ef62e4bea3d79cd04f181bf3382. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/GBLWD2305405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d60cc034c3d58f6d7d3bd9c51184d58f25e7dee9f461e06d88188a0010fa770. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBLWD2305407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa418e3e29fb1a67e918cd28d7fcc15448dc8b9f4619646fd2e52a4f2910c72b2. 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/GBLWD2305411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf69624c8fabd3ac312460572e200ebfaed8d9b2d51bd9f5350eaa124c82cdd0. 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/GBLWD2305415.
Your Holiday Soundtrack (Argentina: Selected Tango Music)