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 0x02fd81447b316b2565597234d944b096acb82c4f7e6e83b5c49048538db91a61. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5374b61d-47ba-4c5a-bd7c-95ca796fea34.json and https://artists.proofprofile.net/proofs/artist/5374b61d-47ba-4c5a-bd7c-95ca796fea34.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 0x116758216c1641f666b865115bb3dabd9790c78a48e2ac463617ebf664d6909e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GRER19500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e43949fa78251b8ccfff94239975d416aa4f4ef5516e996a0d8a20d4ec1dbf. 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/GRER19500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418a8404058d92ac233721583bc8aea281fa88267e3473f7c11f3cd9dc3609e7. 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/GRER19700044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ef5deffe004fd03c29200080053edc138ad456d5fa4f2aa3e31c98ac2117ed. 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/GRER19700046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ff933d659bbf0fb6d1e6dedd84a351f069f0956c0368c000871577c688ff0c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:30:34Z), 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/GRER19700053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a973cd206bd33b1180d1e44e2a4dec389fc7b9c639d21cabc2f391f0a5025d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GRER19800116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58126825edd19e891320601cc2a8c57d647511ce3f3afe7942035e3dbb864992. 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/GRER19800120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7f77ea45697bc2be12d79b4cfd50ba48508e6892e40f6b2ca89b179fdfdc2c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GRER19800123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24eda724811bdc575e00a1d586d02ff255ace2f0474aca8c63bcc5aab36c88a. 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/GRER19900151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7002e565a2d87132403dedf73db765d5a62d7cbe324ef6445fc431db73a6bf8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GRER19900153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24eda724811bdc575e00a1d586d02ff255ace2f0474aca8c63bcc5aab36c88a. 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/GRER19900151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426aa49a440cb9f8f59a78432a63a66fe54e97739fc63c5b5dcb52d0be53d39d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GRER19900154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd025d8d65480dbe4994d5dbeb06457fd049985f728dbfbe1de7a7cf6f0bb8a5d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:42:29Z), 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/GRER19900158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643196e27e8659b91d9abe6d461cd4bb1c50f3cd26b0dae22730b501f2e64087. 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/GRER19700082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75188d05c026bc1c56cd86899e7af387265725215745468d4f43c7cb586222b. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:19:40Z), 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/QM7282019548.