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 0x1dd8e61e27daf3c4b16014293f04c1cc184c9d68b47bb877097e9659885a8038. 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/f78d5a0b-338b-419a-ab51-8b91ed6ddebb.json and https://artists.proofprofile.net/proofs/artist/f78d5a0b-338b-419a-ab51-8b91ed6ddebb.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 0x6e956f819ff6dfa468609077bf671492f1d726b34858b227f3521063e8b344bf. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:53:23Z), 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/QZ5FN1956342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32fea0a2bcb9c1005404779ed7ecb1a0831552e96ef1e8d1cdb42b809115e7b. 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/QZ5FN1978163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983452ad0a80d376238c2509f31f16527c32e8e5430b64af1c12a296ef2da90c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USLZJ1930058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55f570abf24ff5026d94f0c80e60b2f40e54d2a1c1db9fb5939a0150ffdd9b2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMHP2023059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5755ce7cb62bc204db3731e8614b2122545ae7d41a1d32b486a8b82d521556c. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:49:06Z), 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/QZTRX2341463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebe2b8e6806fc7e2b2e764ea919bbfb41b79ab160f9229bb59099b8383d5d50. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:25:36Z), 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/QZZ8B2344584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afd464f0a17b2007fe1d20c09fcd84d02401797764b510962adfd3a9310500a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZZ8B2344609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf198f46c40c719a9cfb55192b7724ed25c0e7202416ce1e14f0e12473078de07. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USLZJ2469419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7377361db16c3d3ddf76116e1f5ada5d85fca175568f7bd137ec55371213dca. 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/USLZJ2469938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7831e5c87915ed51d59476066b4d78f1840298fc603fb396c642c3751c326f26. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZZ8A2427923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c29a3416749501c9270a56b1bd27fc11838679d22b7e173ec85267a4c52a8a. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/QZZ8A2427937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4106ca9a54119894472f2359b004615dfb35f4afc3cbe90baf2332a990226664. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZEC2473040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad63d18baa293bc1fbfd185857a02b4cd6614865c4e05a1f763b8a13ab9232ac. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZZEC2473104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c6d07c1fb69d42ebc6282c64a56565213dd116fa6087f9bb90a3159c9a9423. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTRX2557096.