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 0xb21876d342e1a1361b13f57bd9705580d46c7e3fa9fae0b1f15aa6ce4357633b. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c16782a-8d0d-49ec-a15e-1891eea1b2f8.json and https://artists.proofprofile.net/proofs/artist/7c16782a-8d0d-49ec-a15e-1891eea1b2f8.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 0x6cc47cec7fdd5f64a6c067f25a954b76798d1d6d0c1ff1781e67053a2a2c4c27. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:29:06Z), 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/QZAKB2440748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025381be0bc468ae34cbf87036099c7275accacefd28c100d5f52addc309044c. 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/QZAKB2453641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567ea4c797ba09e852040624662bd49d0f57c5e0fc9a69ad5a5422beb1dda4a3. 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/QZAKB2453642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb551b2c1b62dd2a2556f5eb1ba8d27cdc282dd4ead9bc841a5e1aeeba602103. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZAKB2453643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5f8ef64c3455143836feb8dad063b00af6dbc27a855f37a92d0b0d4324056f. 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/QZAKB2453644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf306c9d613ffff32b6f2623c85127bc245b778fe39eaf8ff124e841efc7e3481. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZAKB2453645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c46805c050a3ef73ae6824449dd72c5e1a16b02d711dd223ee155525c31fad. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZAKB2453646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122ad58caa5ee245d337008341dfa76330238e279ed9a3c3ef56d720936e59fa. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZAKB2453647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11339fec5724532e932dc32896c63f2551fc23c9300bc7ce55ec080faab69a8. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:11:06Z), 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/QZAKB2453648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d242a814b8e1394472ac2922ef99940097f24c247cc5105de00d96b15690b9d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZAKB2453649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0a15919723d2f8a7272aef585838cc959c8c8bb23001fde94cdac6dadf7498. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DKN5T2500101.