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 0xfc3adf618c6a688cb01ce9865fedd685ce58d314a7f298f2895b993cf1154358. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6ff2065-f3cd-4518-987f-058bfceafce2.json and https://artists.proofprofile.net/proofs/artist/e6ff2065-f3cd-4518-987f-058bfceafce2.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 0xe142fee8d4fe80ff86f01fb69a6d1389ef912c5f6dfae9d995fafa1a40acff37. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TR0061100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c1fe4dc453fe9937c8d59893b0d25a1eb30b1592b5bf0a3a34f04dc32b35bd. 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/TR0061100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd76f9c97ee5f461c8cf41fc28da9b55204e95a05b7b3ebb0a1c8c52abc0c044. 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/TR0061100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca7b5c53bf12580920756b73c1254f5fd98883b1a4e5f76853d2a81c5915ed8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TR0061100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf37867fce1176105a6bacd945371ad372cd1921533cda0061f0667e9539cc1. 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/TR0061100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac7e1563df8d34b00e9805ff037d790e2ae03a0d75c9f97ea25b396ceee069f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:29:07Z), 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/TR0061100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ded2f31c57978cfd01aed31f74db1f37c7aef2140a9b9145999f21d3bf8fcdc. 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/TR0061100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01acc3ae4dd58e920e45b8d74a50225adcd439a86262c44513fc4606c5612ce9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TR0061100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c57ea35e20c0f81337f7c759082f49f58a34263c25b8b2c4b6c4719211fc36. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TR0061100049.
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 0x509b9fa8d1b471c5e39a34d90dd6d214ed1036adb110089d3e4420a95e375cb6. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/TR0061100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b3d88231cfd5c8288f131ebc5926b4cbf986b6ceb5fc75f2235b661c5781ce. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TR0061100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef14a667bb5937afed8dd07f42f2ef54da41d7bdf3ffd0df5dd97b13a008d2bd. 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/TR0061100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ef1d0748f7dc67b0f01fb719099ee0aa175f3f0e6cca9a40eec5456ffab769. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TR0061100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b51449df5e9600e5a8362c69aa8d9d45fb6343a4bd2690ec30dd364b70de162. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TR0061100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d53489d77b01ef9e96b296ca628750882e2e3dbbeff040bc85998ad1a99354. 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/TR0061100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b08f57b262a6361d4cee4b5e3ae6abefb007b3e7672c9b51638ea70699c737. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TR0061100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ea9f8f44db61585b99bc7620ff56f4b5d775274d77dba7c70d10d95844a268. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TR0061100065.