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 0xfe00f46e032ec82dff7f33eb34872613d184b5d315355d65653a781d2ce46505. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5cccfe0-2a97-4679-8787-bf55b615138f.json and https://artists.proofprofile.net/proofs/artist/d5cccfe0-2a97-4679-8787-bf55b615138f.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 0xf7864a36d35ae7ec36a9bd783538010655abeca78f683ccb648dbd0fd160de3b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SEVWR2300601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d5b2e5968508223dc21eecac82ad6c75e7670475b487ef36051be11db322a6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/SEVWR2200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8064bdd84c934da15ac6abfb2c4cb0cf826d86069815d2516af4162ef6b14ce6. 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/SEVWR1905101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cd72fd3e6c2cd1133f0e5785c9122e0a7cb4238c6e2116ed452bcfb25c8214. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEVWR2104701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fea27ae9c9df40df28c1d704600f22eb0838db4a8d61976314c6a3e3190da0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEVWR2300603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24edf52f3e1ec0d20e2a211f1863ecf62b61782700b791ac1f3c9671d93df6a6. 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/SEVWR1400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007a1b90fe42d42e6d69721fa91d907fdc61e5a50fda50de4e67e87d42ec8e8a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/SEVWR1100204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360f89a002ea1339519f6c4e54d8dcdac1ab68d9cd06be832b589df675bc6627. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/SEVWR1100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c86f7a50cf846bc814d38e03f9514ae5552783a98bf982017e3716b212fd7f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/SEVWR1100203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe230c5920ba89e78f8d798b3274aff52eb27b4439293aa2b136b6b969f5bcb04. 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/SEVWR1100207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e536600850dd6e4ec6e25d208d024fab052dbc81e60cd636d2738493203bfe. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEVWR1100209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3539fa4b0a581bee631b103177ca4834821e95291eb389e27ee178b8f362719b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEVWR0800401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804d28dc6366835662c1df54792b2ffe23bfd69beee03e0a6f4e238d24d2b852. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/SEVWR0800404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5af67b86bef69a9c75c42b2b0c165aeedfb20ac230bcd4fc9840b04fe7bef4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SEVWR0800405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d5b2e5968508223dc21eecac82ad6c75e7670475b487ef36051be11db322a6. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/SEVWR2200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7bc7aa7d91423074f5e17104b46e02953d6129280b13cda51c8d5a69dcb873. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEVWR2103301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b11bfcd14cdd9c97c9599f311408bc49e5de1d0773b1a98cdd26b881c157b4. 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/SEVWR2000901.