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 0x8be7a8bb7a0923307dca4ef5e364c06b38f412f7f5917cbe9421ab8c30b33698. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c0b393b-dda6-4f58-b94d-f3f6a5597d0f.json and https://artists.proofprofile.net/proofs/artist/4c0b393b-dda6-4f58-b94d-f3f6a5597d0f.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 0xdbdea5abba298bf9eb38075ccc22890d1e7cff9c78ea3989065794862a6e3fb2. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:57:16Z), 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/QZW9L2296062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388749b9d5eb9c5ed38ae491b022634ec744138356ae3717ec4c9342aaeed14f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFZ42336983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9222bcaf0214c142417a2e9f8e197c049d05247ca25ab0a205430c34e035174f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:52:44Z), 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/QZWFJ2341040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c48b5703760acf04ec2fdb5a45ff29e92bcb4159adc1920fced6288ea66119c. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZHNA2333355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2860dd4c05971495e1d21efd4fc3008c37dfe7ae3532cc1156706c672bcd73d2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:50:12Z), 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/QZTB52437516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882d46a61ca908d6e420321ee317f91952e591328f7303fc56ccf91281da526b. 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/QZWFN2461901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140fc92ed8b37ab0aca5c4cf6c61b83d20f9cd2d0fa500a7071a11d8c4ebf1cb. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZFZ22558543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140fc92ed8b37ab0aca5c4cf6c61b83d20f9cd2d0fa500a7071a11d8c4ebf1cb. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:08:18Z), 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/QZFZ22558543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecfbe16fdfbe6b5bf383707feb4b1b58a262e9f9966c50589fd25fa63eab82e. 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/BK4DA2508040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b1186c4956dd7a136ccedce49c5aed8dee337501df221bbff92996db123ab2. 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/BK4DA2508041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140fc92ed8b37ab0aca5c4cf6c61b83d20f9cd2d0fa500a7071a11d8c4ebf1cb. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:01:15Z), 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/QZFZ22558543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe83b71ed310ae89d5edb97132545db5077e7f42c272cd9bd503ac903169930. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/BK4DA2508037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22305d0782fda4c387e9e5bbc96834357ee3193c6ddd9573385f6e76cf65950. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BK4DA2508038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ee0404e4f0d74818b79f1f7e7ffd0fc3600e4c71fed78376e5c3b7f2162128. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:36:03Z), 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/BK4DA2508039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64736515fc439fbb029ec7bdedc27e3cb0b95955b0bb0723f616cd225848be15. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/BK4DA2512074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147126b58bd9ae21eba7f33ed719e1e594fcffcdc3d73a533d1b01815e9d8ef6. 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/BK4DA2512075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48626084b7a0f800ba91c4b9c7d05c5184e6c2bd65c37a02e884d25ffb877d17. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/BK4DA2512076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffaae83e9050d2d11dfbbf939c061616b3fc9ab8a4adf519b09a507ea1577a24. 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/BK4DA2512077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9718e2dc86ad38d157bdfcddb4af8a9115dc4f20d8de9c0c6ae3dab29b97634b. 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/BK4DA2512078.