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 0x0fb0fba001deb9441e588cc2bceb1a3f9502e86c3f07d51c6fc65ae27f3893eb. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/184f9432-34bf-474e-8d0f-e00133d6238e.json and https://artists.proofprofile.net/proofs/artist/184f9432-34bf-474e-8d0f-e00133d6238e.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 0xa89b794cc72dc0cc3e7337d02d415b8709bbbc5af83dfefc59bdae3c738e7fd0. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAJK2504611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577e54022f73222942e1bf5724647e5072675fbab4c0bd223e8a18a1555c9111. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAJK2504615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700c92a1a91ca32f6845f3da1f8c9e3fc9ca8c293fa3375f629a4ec828411858. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAJK2504619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18450826758189b8db52f40ea0b02a4360087b63dc3ea551bd09cf4cebf4b82f. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAJK2504622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b41e279382f59d40f02a790434ce3c97c1bb71e2fe3431e870a605fef3991cf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJK2504624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0ac0b3cf543e0e1d928c4e8e8c3a83adcb1938899dd7edb8d6367961584390. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJK2504627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f809d940a7f8f8d2c292213da72493aeffd44aec665153240ab4a1878019017. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJK2504631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8807cc29d1d662d90aa4a76178c2eb129c58f5c6b195d9c269f57de914fa6e86. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJK2504634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2e4d561cbcae74709622df97a94c80d7cf437af21b8fe2be81b3bd99aa5c93. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/TCAJK2504636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726c33bb24c1a4d22c0cfcad6356b0408ba5eabd9a65030c257bf896f8b5a1c8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJK2504638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f638e96b4c150d22814cb1e0b535955bcb4e01fea15ede6ceb5c49ef0efc14. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJK2504645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f74da6d0fc299342e0b719846d59c1fb25c3a3fed7291eb84bcfff64f8a593. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJK2504649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50d58644d6ea74d03d333370bd96ee5ed27e88aaaa7aae86cb1dc299261e409. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJK2504650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06380ac853c34ec8a16c5c04fe2d5dbb996ff63d1a6c9c635238561581ac05a1. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAJK2504654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812b0ca3de52f5356b1c63b8c1255453343d1723c0ee6dd9678aa481fb28aef5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJL2504657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d41800ffd4080e91d9656e290d3c358042d8ddebf9d2c14c9c71167bc2ead1c. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAJK2504659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5182df4745a119fc14b9bb2c19db42077ac3760484fb707645e6b72156cbeb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJK2504662.