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 0x9cc45a55de8832160c7d5d066ddddfbaf78c24d679eea8b8354c3b7c05ab93a6. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48c96b16-dd9d-4729-95ce-3d110c363793.json and https://artists.proofprofile.net/proofs/artist/48c96b16-dd9d-4729-95ce-3d110c363793.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ad Te Levávi: Inngangsvers 1. Adventsøndag
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 0x626559fcef76298ffde0c23718c4094e4e7673a73d786be76dd33fcc1319da80. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NOFCT2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a524506d5d266f7ab1ad0b0400b85f83900471b82099fe2d71dad32cfa1ad9f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NOFCT2401020.
Nos Autem Gloriári: Ingangsvers på Skjærtorsdag
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b3afd1b77808e8388a9c1fb29f3efa23c0ccf983ff7cec673211d916b5b021. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NOFCT2401030.
Ubi Cáritas et Ámor: Antofon ved Nattverdens Liturgi på Skjærtorsdag
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3085d8b607211b7fe191555f6b67fb80992bad1960a837bf3c9f14e2f0063a7e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NOFCT2411050.
Parce Dómine: Antifon i Advent/ Fastetiden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6629e8e78219fab46d3f1a6685a3ce469d9658077923411a2cc51d3478106f1e. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:19:52Z), 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/NOFCT2401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e49d07d28307ce92554e53730eb4839238880264dbc79e2d7f2eff027c94213. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NOFCT2401070.
Et Valde Mane/ Benedictus: Antifon og Sakarias Lovsang
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344f6d502b73aff36580155eb56abf35cec52c72586ef9beb334a7d00b5b2d7e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NOFCT2411080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27678aebf2ab55d47d0e0b8cb2a1b5056012c013562e2513ecc52301973c73b. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOFCT2401090.
Regina Cæli: Maria Hymne fra Påske til Treenighet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0381ca69fc91d1307f1334c23a223da84e75b5f61dd7b64328834e41e2971da1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:34:27Z), 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/NOFCT2401110.