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 0xe4f43a3b8fe86265b4ba159065978ed9719a7a2233684bc5f4d7f5f9ac1ecd1c. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5aa80b1-0d70-42a3-a069-adf4c8b9a0fa.json and https://artists.proofprofile.net/proofs/artist/b5aa80b1-0d70-42a3-a069-adf4c8b9a0fa.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Misatango, Misa a Buenos Aires: I. Kyrie
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 0x4ee7fa14bbe3f68bbe9026b89d569d9d55f12d447a1f2ac54e85bd9eb0b2429f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRW951614201 — a six-check JSON result.
Misatango, Misa a Buenos Aires: II. Christe eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9310066a9aa3c26deef8dcc13e4f9bedb4fa3b74f6eac8220348042395b18e58. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRW951614202 — a six-check JSON result.
Misatango, Misa a Buenos Aires: III. Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cabfc5a66d59c7ca923ae7dee924ad6c0ad0e49905c6b4e8e1a17e2647d0ff. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRW951614203 — a six-check JSON result.
Misatango, Misa a Buenos Aires: IV. Qui tollis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94c0152626f15d402711eee6717767f1f33e5be74a790838b84aadbea2e5ae6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRW951614204 — a six-check JSON result.
Misatango, Misa a Buenos Aires: V. Quoniam tu solus sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84df6311c0c5e0b08fb5be2d56e722d8725ac81b5761f25240755af24aee9bdb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRW951614205 — a six-check JSON result.
Misatango, Misa a Buenos Aires: VI. Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf75f7c0dc226e1f7ca027232704b8d61b1d1bb6e181500722d890b65ec83f1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRW951614206 — a six-check JSON result.
Misatango, Misa a Buenos Aires: VII. Et incarnatus est
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0aeca1232b2e085d8c80d0e44fc427475e3d42d59fc29caaad16ef2ec5c1fff. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRW951614207 — a six-check JSON result.
Misatango, Misa a Buenos Aires: VIII. Crucifixus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555e337befbb42b8019fbab260a1371f9ecf54e45dd60f0138d58693c63a46be. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRW951614208 — a six-check JSON result.
Misatango, Misa a Buenos Aires: IX. Et resurexit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33c739e7241b057a45054a42a28184926e7671a5b08b4402af2c319243e1c57. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRW951614209 — a six-check JSON result.
Misatango, Misa a Buenos Aires: X. Credo in spiritum sanctum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd24916c988837d69f7fdca09a634050fc2d962e2f129f446d5028e7ee194b6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRW951614210 — a six-check JSON result.
Misatango, Misa a Buenos Aires: XI. Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0348c1af1344a1f31415cf143c0a4cdfcdb59155cca200d60f2f0b977e890c09. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRW951614211 — a six-check JSON result.
Misatango, Misa a Buenos Aires: XII. Pleni sunt coeli et terra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575420a36e0287904591b04acac9cdd93ea54b0ffaa96cb17b40f2f691d09acb. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRW951614212 — a six-check JSON result.
Misatango, Misa a Buenos Aires: XIII. Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72b9e8277cfd0f0590de4d2de217289be7175222cb4cacca1d3bdc2c442c238. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRW951614213 — a six-check JSON result.
Misatango, Misa a Buenos Aires: XIV. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee01f7f1f5746ec02d21b55bb68677df31c7542affd662c17aeb58041e5344b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRW951614214 — a six-check JSON result.
Misatango, Misa a Buenos Aires: XV. Dona nobis pacem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64563938caf0045547565de8460a5fd79512f7d8643045fab9eecdf21279da11. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRW951614215 — a six-check JSON result.