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 0x01601e457825b2281f13d9f0e8f97d199af64f4a66af37f68b6d4e73773ceeaa. 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/98a1e75c-0ee5-4268-b002-d6bd33ab82b3.json and https://artists.proofprofile.net/proofs/artist/98a1e75c-0ee5-4268-b002-d6bd33ab82b3.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Tail Orchestra - Symphony No. 2: I. "Grill”
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 0xd76a47c19932ea9fea19c4d94d1c66eb5d414e604bf125e2577399a94f8c76de. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2416946 — a six-check JSON result.
Tail Orchestra - Symphony No. 2: II. "Broccoli toy”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6292286da67a1195007222ffee530283d7d44ada840acfa71a52624009e97f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2416947 — a six-check JSON result.
Tail Orchestra - Symphony No. 2: III. "Pedigree Canine Cookout”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a096e27ee5b883ec06351cc0fbe7e8ba4800b3dabffe7c4cecc7d9d0ae06efc. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2416948 — a six-check JSON result.
Tail Orchestra - Symphony No. 3: I. "Tennis ball”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee3b65f206ab8856500bd1b519122f98bfbb4df4c0a478c2399500808ab33d0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2417026 — a six-check JSON result.
Tail Orchestra - Symphony No. 3: II. "Vacuum”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fe41f93ea9151993a404b5f4a1ab23418a93f8952d62acfef17d9e48efc7ee. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2417027 — a six-check JSON result.
Tail Orchestra - Symphony No. 3: III. "Pedigree Jumbone”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd81c0378d8d0a9f9ef42598f053a9ddf6af80c155272c3944a1892df4133bde. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2417028 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815926f4c4011f74db2c50aa0b69637637c2fe71328497813b78c6a35d228cfa. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2417032 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee3b65f206ab8856500bd1b519122f98bfbb4df4c0a478c2399500808ab33d0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2417026 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fe41f93ea9151993a404b5f4a1ab23418a93f8952d62acfef17d9e48efc7ee. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2417027 — a six-check JSON result.
Tail Orchestra - Symphony No. 1: I. "Toothbrush”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5154d781003b2edc528fb8475a47e26f19c1b450c59059150f06d6e862fe872c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2416926 — a six-check JSON result.
Tail Orchestra - Symphony No. 1: II. "Squirrel toy”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921df95810d76496b6315aba02f10d97f6c304956f6f48bcecdc8fa130eaca9a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2416927 — a six-check JSON result.
Tail Orchestra - Symphony No. 1: III. "Pedigree Dentastix”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864cdf47487bf675f645ccdb621ab0db6bd455e40c9e1e7cc5657a76f7caa937. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2416928 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76a47c19932ea9fea19c4d94d1c66eb5d414e604bf125e2577399a94f8c76de. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2416946 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6292286da67a1195007222ffee530283d7d44ada840acfa71a52624009e97f. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QM6MZ2416947 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a096e27ee5b883ec06351cc0fbe7e8ba4800b3dabffe7c4cecc7d9d0ae06efc. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QM6MZ2416948 — a six-check JSON result.