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 0x4c856a0ce9acefd93d452d131951f765d455e457a31d10486835e2e8ba5e0d36. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12f66fec-131e-4500-80bb-99e9f197f2e5.json and https://artists.proofprofile.net/proofs/artist/12f66fec-131e-4500-80bb-99e9f197f2e5.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
The Fairytale Forest (From "A Dog Barks in the Woods")
Metsässä Haukkuu Koira / A Dog Barks in the Woods (Original Soundtrack)
Passio: Numquid et tu ex discipulis ejus es?
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 0x39bae3f77c1bb9c47ec121902b98167e6dea7b8ac674e430effed8b79332c463. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEC2112050 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4eafd1d8227b0a785c3fd7dca1e8ad5b21b72a8f864515759546be044ad01a9. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEC2112060 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986e8477d79ed609732d10b63643ce5ee3c52c8f7d5eacba828e42aaa019603a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEC2112080 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb97b268e7a77978ac2f2818689f71e980b380cf6fe0d93f144f83f699078314. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/SEAEC2112070 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6719388e3d0c5fcbc7b23df76e53e9f66eb959102d5746740aba9b4ef437241. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/SEAEC2112090 — a six-check JSON result.
Nuits, adieux (Version for 4 Voices & Electronics): I. Nuit I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7da79d2b32bcf7048d9a53ccee2e8f6841eea8d0bde8e3aa09da7ab5011b9b. 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/SEAEC2362010 — a six-check JSON result.
Nuits, adieux (Version for 4 Voices & Electronics): II. Adieu I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c896884956f9f964ee07f562f913a052bb0641b8ac277a6f87beb023905bf8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEC2362020 — a six-check JSON result.
Nuits, adieux (Version for 4 Voices & Electronics): III. Nuit II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d6d3fa9f807b249a5e101c2a6b2b2539fea2a25725776183b1d19c11cf16bc. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEC2362030 — a six-check JSON result.
Nuits, adieux (Version for 4 Voices & Electronics): IV. Adieu II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df0c2ae310fc98108111220152addd49ed786722c2e1cf7fac1d24c0fe90439. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEC2362040 — a six-check JSON result.
Nuits, adieux (Version for 4 Voices & Electronics): V. Nuit III
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2baad639c60457dd0a5406fe996c626d685874c8d939cb8b4091cfae883edbe. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEC2362050 — a six-check JSON result.
Nuits, adieux (Version for 4 Voices & Electronics): VI. Nuit IV
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc5dc1c51db2477b29aadd800474b691c793d8f87293257803551ef9196daaf. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEC2362060 — a six-check JSON result.
Nuits, adieux (Version for 4 Voices & Electronics): VII. Nuit V
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f8c8d531185e0e97f3002511ff5b53fc043e24615da08e8ab4ced231a816d2. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEC2362070 — a six-check JSON result.
Nuits, adieux (Version for 4 Voices & Electronics): VIII. Adieu III - IX. Adieu IV - X. Adieu V
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2567d4315c2d73fcb4b31a42e17ada91a03ab3a68963695e338f71832df71a9c. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/SEAEC2362080 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdde863cad27b204c57f0870cf2b7ce1c6e0cfd4009bcafc6450b8a9a597cf8. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SEAEC2362100 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd90c2239094b7ba424c93bd731e6e1df2b248cfdaa8ec84fae56a2660ecc142. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SEAEC2362110 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff40fe7bdf94a52a0d9e1245af7cd8edc5f43ddd8d9b831411582b21b24125b. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/SEAEC2362120 — a six-check JSON result.
Nuits, adieux (Version for 4 Voices): I. Nuit I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7ce4d26d9892df4e204c7ab613aa2a53a2eddd5a5945c80ce7d2de97adb058. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/SEAEC2362240 — a six-check JSON result.
Nuits, adieux (Version for 4 Voices): II. Adieu I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855c230777cf6a877ea9ac30a7f83733d06f7280b3917e30cc596311d16492bd. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SEAEC2362250 — a six-check JSON result.
Nuits, adieux (Version for 4 Voices): III. Nuit II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3792e4084d00b6504e8975ebdf2bf67c1f526833297db223222edd0b24dae0ae. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEC2362260 — a six-check JSON result.