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 0x4efdd0bcc3e2640e853bf6420853cb19974b42d5ed4270b2f13b4996e2051e42. 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/9ebd57a5-dff4-4f8c-9426-4ac9756051ad.json and https://artists.proofprofile.net/proofs/artist/9ebd57a5-dff4-4f8c-9426-4ac9756051ad.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 0xddbd22a6ff029c72206c1e09dc5e47754641adaaa2da52ac1192985849cc3f11. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BXKG22000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69aba10d530dc780c769609561faa4a7bbb4c0c09c49ddbebb4c6864fb72faf9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4442400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941e0ddeb003cab2422b21fb053b935b24a8fe1f0f83165d4fb83661d45403f1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXKG22000597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf4f208b57babb8ebd233650456ea5a37171133949b7815e0286cd2bf5b1f76. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJW2034178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68e37f34a4a77dc334b42021362076a57c27cab1f2436f2203bf73eac96fd2b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BKUG92400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820590d6389cc6723961e17c877a3d697a94d5f734d77a0e4fe62517398d754b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BCTVC2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc82e474f2c0dcc752169da543192d5227992401e4f9c0c797d32052e0d52bba. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXG6R2400266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820590d6389cc6723961e17c877a3d697a94d5f734d77a0e4fe62517398d754b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BCTVC2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a77b275ce1d448e79972c81a64f245548b6705bf2b8fa30bb8be3c58e702a29. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCD592300164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e096138575766babf0d2a88db038a5e7064c0130e86fba5429024278a45cb4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRWMB2500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e096138575766babf0d2a88db038a5e7064c0130e86fba5429024278a45cb4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRWMB2500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5442f883426f48c010bbf675fbc9f843440209f3ebd28b42cf7aae100ef788b1. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BRUM72400453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5442f883426f48c010bbf675fbc9f843440209f3ebd28b42cf7aae100ef788b1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BRUM72400453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063f88ad96e8f3373bded2b155bae070f6d9ee01e0487ccc6fa4c29ecaff01dc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCM9A2500029.