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 0x6fee0eb8f146b2c39702c3c67b030fe675a62f70b3310250af2c2fca67896491. 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/8d1e93e1-6504-4b03-8b3c-8deeeb909989.json and https://artists.proofprofile.net/proofs/artist/8d1e93e1-6504-4b03-8b3c-8deeeb909989.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x90ee19c9805252149aa2b419adc91bf5f796c85d34f7a1c71e5e284e6e50b199. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1202401 — a six-check JSON result.
Fredmans epistlar: No. 69. Se dansmastarn Mollberg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771f963c6233b2b67dc43547f129b7ac414d8aa7ba738715f8c5edfe8f07e7c6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1202402 — a six-check JSON result.
Fredmans epistlar: No. 71. Ulla, min Ulla (Ulla, my Ulla, What sayest to my offer?)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81914b39a6e8a92f09514bdd3e9f9690f844f412c52dce77c9e801614c9b83b6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1202403 — a six-check JSON result.
Fredmans epistlar: No. 72. Glimmande Nymf! (Glittering Nymph)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1354baed71bd8107a55ed2b561ddd4391512499606deedc6100652d15859fb91. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1202404 — a six-check JSON result.
Fredmans epistlar: No. 73. Fan i fatoljerna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2fb2a78639603c1113193740714c6fc8f3a59a5dbd0b901755d147d439a734. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1202405 — a six-check JSON result.
Fredmans epistlar: No. 80. Liksom en Herdinna, hogtids kladd (As festive a comely shepherdess)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc798ba8136cb03619a5baa44a7b40d382f5bbf8de4f9c25ceb29aba934e25b8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1202406 — a six-check JSON result.
Fredmans epistlar: No. 81. Mark hur var skugga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0943bea9409fa070203c1a487bf41c8e35b7a5c693324fc23b04851049e7d06. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1202407 — a six-check JSON result.
Fredmans epistlar: No. 82. Vila vid denna kalla (Sit down around the spring here)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bcdc8651e85f67e19ffde6398eb811b6964c40d75eff72d039789c64e24a63. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1202408 — a six-check JSON result.
Fredmans sånger: No. 1, Så vandra våra store män - Se svarta böljans vita drägg - Så slår min Glock nu locket til
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebf589c7e78e9f6246ee37fe6d1abef0f0aa8031cdfe762647946f075f6fba7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1203201 — a six-check JSON result.
Fredmans sånger: No. 6, Hör klockorna med ängsligt dån
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde113b6fa5299d408b21259ee2d056b202843174f7b410ad1bb2dd423ab78f17. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1203202 — a six-check JSON result.
Fredmans sånger: No. 11, Portugal, Spanjen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc954a1cdc2ec2c4afb48990ed63de0191bf58ef76796e6b0ff391997fd393229. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1203203 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed03630ece82a573bf03e112805a113cee64b5a2e2f0a96e1a26558aeb58d92d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1203204 — a six-check JSON result.
Fredmans sånger: No. 17, I Januari månad, gutår!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa796a5be7044156fe1d9c0e15321b9090a75b6aa5efa5aac3404d322732f29e2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1203205 — a six-check JSON result.
Fredmans sånger: No. 21, Så lunka vi så småningom
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb685d8191e1452839d99d9f23d80dbcfc631c0febb2d12e247c2bcff087dbc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1203206 — a six-check JSON result.
Fredmans sånger: No. 31, Opp Amaryllis! Vakna min lilla!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3376cdba58d624cdc3f34102b98d7af04b4a93529d0feda8fa85dce635b20680. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1203207 — a six-check JSON result.
Fredmans sånger: No. 32, Träd fram, du nattens gud, att solens lågor dämpa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3cb468739f980c622234631aed32868052abda2b97c464bc6d57b2b6a732c5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1203208 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9f6dd6276c97186b978295c66d21076127610957738c92c39e68322ecc0fd9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1203209 — a six-check JSON result.
Fredmans sånger: No. 41, Joachim uti Babylon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e2ac0474c22b0b0d008962de44b9d27253fd7b3fd5cd2ff3c6938a06d7a03e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA1203210 — a six-check JSON result.