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 0x024e73539f88de46da2a732acaeea009888e69f538495eaf548f40ef0fc12ab9. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ddab9976-4621-425e-a29f-f6c44d219d43.json and https://artists.proofprofile.net/proofs/artist/ddab9976-4621-425e-a29f-f6c44d219d43.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
En svensk Markuspassion: Recitative. Det var två dagar/Inte under själva helgen
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 0x1089048c20541afda6370e62a7de1114562e6af3e30d01729d4bc33c0d12087f. 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/SEAGA0802020.
En svensk Markuspassion: Recitative. Medan han var i Betania/Vilket slöseri med balsam/Och de grälade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62582f1daecc842bfd1820679892c318df9537bb7da648faa7a7d61fd8d73749. 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/SEAGA0802030.
En svensk Markuspassion: Recitative. Första dagen/Vart vill du att vi skall gå/Då skickade i våg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c41bfdcfb1b661f7cd7bd2d74e02b94a948634198dad538163e026cd7e7f69. 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/SEAGA0802060.
En svensk Markuspassion: Recitative. Medan de åt/Ta detta/Arioso. Detta är mitt blod
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc8506dfe7bd988b1f14f5db2d1ecc00e31ee85f4e5571b95a022b661d90085. 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/SEAGA0802120.
En svensk Markuspassion: Recitative. När de hade sjungit/Jag skall dräpa herden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54685b502efe7d2e34308619d5a998b472b6d403b4f59a7339febcd06c7c59d7. 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/SEAGA0802140.
En svensk Markuspassion (Excerpts): Introduction. Han var föraktad och övergiven av alla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042e339da4bbc8710dd06ff97793635fd812a05b04b7b6965fddd0cc3dfd52ed. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SEAGA0802010.
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
En svensk Markuspassion: Arioso. Låt henne vara!/Men Judas Iskariot
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb845cd6ae12abd215990dc688b8216ae232639f46238ce388ea21c0b9eb7599. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SEAGA0802040.
En svensk Markuspassion: Chorale I: Var inte orolig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1b57b00fb5f3e78ad798c1347956104763e2e57dcac9c60edc86aefb467db4. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/SEAGA0802050.
En svensk Markuspassion: Arioso. Gå in till staden/Recitative. Lärjungarna gav sig iväg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b23f4549131ce568ab3576dd8cdc6c6a761d34da4398edb568be458b7dec9c0. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/SEAGA0802070.
En svensk Markuspassion: Chorale II: Snart doften av brödet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9896a7f595a280dd8277435e53320ac587522bcd0a070f6110b0d8174dcaa53. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SEAGA0802080.
En svensk Markuspassion: Recitative. På kvällen kom han dit/Sannerligen, en av er/Recitative. Då blev de bedrövade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb768c06ce53733393152157b838db8c692686ba9f46046929cc8a3c5902d45b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAGA0802090.
En svensk Markuspassion: Arioso. Det är en av de tolv/Människosonen går bort
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669bf31dddc36c295cca59f10b389da13afd50f77a576435fd599d7cc489bbbe. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/SEAGA0802110.
En svensk Markuspassion (Excerpts): Chorale No. 3, Kom, fader, mörkret faller
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d13bf646f38758a44e9626f0de482dd46c7b7956c2c5c00da284ee759af3359. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAGA0802130.