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 0x0858707d97ff04ccd48b9797bca6f4210772e70fdfbd5c464f5e855d70feb128. 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/e694e10f-599c-4aee-97f9-bf4a21ebb366.json and https://artists.proofprofile.net/proofs/artist/e694e10f-599c-4aee-97f9-bf4a21ebb366.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x939e539403416ab3e9ce2b39a48b39dac67ce936230fa9b5ba6b06f8fffa2259. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFF2445630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44e1d3bfee4b5213ca138d4863595d4a120e553920e3d7bac12a4d62dabd2f8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWFF2445631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe596410209caa3b7208767296bf313e366bbe7800e58dc2d988e5c4e43ea2681. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFF2445632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c367b7fb1b3c585461549448d831f3bd683031b5a388088972a406f17563933. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFF2445633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb913e4437153c456356db41c04251085d93d139fdfe4f2d3d3a333549d897b32. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFF2445634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbeb507dba106e0e550c9f3627ddee3887058e2d354a91fea0fcf771fb31969. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFF2445635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360667cbb6ceb1298221b0e01ae3c1fddec520b1615102ff2026c3f398a7a089. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFF2445636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f63640ef12c73cb654f91338c09832e79b887fc3ed1032291c7bce5becf28d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFF2445637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281fc351aecb08c2d132d5fb19799e4741b166323a6c24657bb1509b8945d621. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR59R1704743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028eaec3dbd2a9cd2878c06a83df10c5e24ceff7f502be7734563c920a94133c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR59R1667176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac677f5f7d1dc2d56ffdd68a9c1caa84ea3701317cc9cfb726715b41dfa9307. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA81873596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaaaa4ef29bf4f2ee41112e58d71ce3474226ef28a5f4ceac4e3e32690645b3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHNB2354582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6978015a4050db488691a11371fd2defaa4cc12a790de36482b84078257a1581. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWZ2014284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afa94777ffc3309a8dc0d34ba589066099d5cc3280bd8f36a30669c82ebd922. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWZ2014285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b6d64874eec7709f75ad7a4619de7215a72af9ee1bb40344db2b7077b2dd27. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWZ2014286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1e64407af767c49c6d94a4bec3142dbe0ffe9a10824839e7b23ef79673d8c6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWZ2014287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c49dc5059679712531020c8627b49ed30409c27ee1612b142bcd0b7b6a02e38. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWZ2014288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5a1918cfe9ee44acec305dd79d2ec617aea79efd3fe019a362328b442bfa20. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWZ2014289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece2990ebf675aee9d7277e112dafb6687e76f7ec4cbbe84583f46abd7622aad. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWZ2014290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59b1352c77f79b52541e214565952247662dbe48160b22b84a8ccafb87f040c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWZ2014291.