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 0x568bdcab67b1719ff08e567845f840f12f321e0f8a128d60f2bc05e7ba2ef26b. 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/ae4a5618-0891-4b19-9aae-f50ab14bed8b.json and https://artists.proofprofile.net/proofs/artist/ae4a5618-0891-4b19-9aae-f50ab14bed8b.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 0x55333c77f59e679fb18cc43ccb055138bffbdae69da10c1af6111c326d73a998. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:30:19Z), 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/CA5KR2392437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c48e340a0bcb5c3ec7f21eebfcf897cd6caa1de299ec6a70d690dde78a23b4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CA5KR2392438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ea74cc5af9c373df99e17017cea60215ff9b05bb840f276a02455ee1fb65ce. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:55Z), 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/CA5KR2392439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9542695a46433f68ffb2dd5f6ab1b47296c18e8627892bf5281c59c77de733. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:57:39Z), 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/CA5KR2392440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc4a6e59684f7cc816130ce9f39a0d482bc83c18e7f46cfeccbc0e51c7e1b7c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CA5KR2392441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5087dbe6343ed1ad7d584f02b7208c75295997d6007f37086c138a10802bced9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CA5KR2392442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b40c92ecacbfc59db151d69d5ca2d5f160a9f83fd4d2ec9bb60c9a24661b772. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:20:44Z), 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/CA5KR2392443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ca77dd001925f2fe55202c807e7e6e8f0d7f263d299139f245d31faeeca95c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:29:09Z), 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/CA5KR2392444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75863b2ceda6c8987f4d958d74a19f6ae9a59226e7f51f5ac2edef946d809801. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CA5KR2392445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6ace0ccc87a709e1fc03e4c956573a8e47a02f98eb6d4ed9044a5eb38be5f4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:31Z), 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/CA5KR2392446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34d37745ac930753cca7bb774c53f9caca299a29e8e833b79f7596eee297784. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:32:30Z), 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/CA5KR2392447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2da51f4c72c6938c6b36b0ded4e72f129f50ce79c799565e1c10b28025a131. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CA5KR2392448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2479be0060728ae2622fa991bf58fcba45533aab6a86558406875cbbe1e0d40. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CA5KR2392449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1fa707fba0046fba0e42ab10856fa519f8b4fec5df1d5772fa69d681a4c2ad. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CA5KR2392450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1e26803fd242990af91f097479b4fb77dd6f3fe35343284c91bb9efeb5bd3a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:44:58Z), 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/CA5KR2392451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14cfce17a18bb4b6488a9618d98485ac3f9922aa50364a793ca02544141b16a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:57:51Z), 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/CA5KR2392452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe29906e5f265b4f22d5849a85bea547df6879942b40b46a1e95c67bb3132727. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CA5KR2392453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb522db6e030e057f88bca50d7348a043b3b6214c87e94bc5cded3c9dfdd43b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CA5KR2392454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abd8d6e1bd4fda11a33f30a519170dc17a4b65071ac28aaf6c4abb76af288a5. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CA5KR2392455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5db675b32402b5497610ec90dc0fef8b58de909cec58bf699e0fe984efb1296. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CA5KR2392456.