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 0x469b26447a26de9c02c8e89f62fc14c2fe6e418d1ecca17fdf14d24685678965. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1782dc8b-9bd0-4a1c-ac0d-3d1ceb2cd071.json and https://artists.proofprofile.net/proofs/artist/1782dc8b-9bd0-4a1c-ac0d-3d1ceb2cd071.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 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 0x8348410c6f1094450df68bfea63c1820bee82540690b3933201c41c220c2f3b3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN92396244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4725ac13f9ac302964dc4a904ee15c65eed3a63673a62e9efb02764b9b7757eb. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/IT1SS2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066ecf39acd200c85d00886023f5111449f34db57b801f2fe8e7c03cabc412b3. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/IT1SS2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a929a0a87e5c46fa9b1341de065d0d0537de8935e6f383c6c8b2bf031bb98df. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/IT1SS2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa8110e808676e62f2e84b6e8f91d68b7430980f6ecd13a608268789b0e6539. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/IT1SS2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f16489692a3eb4e50e391bb08298eda50ed0375e62579ad18c2eb7a4e845938. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/IT1SS2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece59f6127812e271fbf33ffd38d6bd84db05886def58d977cfae87570814f66. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/IT1SS2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed77e64b7762da6cea67730ebe437683123cb77c7a51697dd9497934ea6a892e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FRX762505531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465fa4f3afec137ea2e43939169853555cac1e7814810b18d66c4a48ab702218. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/FRX762505532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594f06827b631429436ecb6ffde982f3b81c88f342499e3cb1cf6f9290ce087c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRX762505534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e1c1e07f2a2720f822dc0a87a3c5352e28c96fc3d13e916d1f6359b80a8041. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX762505535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1724a0460d37e77a31bcb033f74c43e56f44df6ef64aaafcee998210e7d308da. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRX762505536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c839b04f5e54e415b9503c1f6bc66645f871c56da35521d6fdc730054ebdf82. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRX762505537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b1db6790159084da7d872b6be7af70251f2a71bf61bc697a393aa73249eb7b. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FRX762505538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa8110e808676e62f2e84b6e8f91d68b7430980f6ecd13a608268789b0e6539. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IT1SS2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fccea718e33d80e33a3b26af18b24f5b386ebc6ebb6b7a7ab89e8e420bb455. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITAXQ2400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf668cd97e00638e8f1c2edbad242ff6128626d8d145b5df2983ef5b6c9cf304a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITAXQ2500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa352b54bd277d2b244b56194723be0c449bc601535862e26756281e3734eb673. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ITAXQ2500085.