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 0x85091dfe9f1e17467a8f737aff4b3727edb331f695c401422a5adf9dba494b91. 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/4b3859df-bcf7-4a14-a79c-11b844aec1b6.json and https://artists.proofprofile.net/proofs/artist/4b3859df-bcf7-4a14-a79c-11b844aec1b6.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 0xaf270a655e6939b00ed61d43f07f993510ce075adcf978c153964c425e3d4c50. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GX8LE2457651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2c81a64c7290a70e11c037a6a35424cac9c098c2b55b942cd26f1d0b4f4694. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GX8LE2470197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969d0ad27d33cd03cd9a50ffb24e69685bc1edb8c7fff2898963e5b3cf16a935. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/GX8LE2453071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a80c0a84ce6cda2d05e34ae8337d811a01230fef047eac377ae77670b119fc. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/GX8LE2419001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9345c10e4366cc945725011ea7ecffe9c99fcb00edebc2e2ace90758d315e5. 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/GX8LE2486286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0340ab6b622889040a6c6655178dbbe89f725001cd43b66e034d9b2243c40db9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX8LE2403116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcedc586de183f574eec232fd75ecfbcf13fee19bb34320dd7145b8394836dcc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX8LE2401987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf643cbc71b4f081cab0a42b1d3548f1f77193d96b2b75083eb7f458dd14cb3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX8LE2405839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393bdc6f5954630e9180f66ba4d24140f98597cc2fe9c624f52927d3d7e9d3ed. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX8LE2487943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84163adf3cbae7a5eff57aa2421baeb4a47f99bcfac2f6cb658ee87bbc55b6b6. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GX8LE2458406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdba23947dd36f775c9ed71aa9ed915a7ac06acf47e32145008c81431ed5417. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX8LE2445637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13971f12e3098d52c6f713ecbe862b25f58e2f676b7417d79e0fc371bd56979. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/GX8LE2445493.