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 0x2868adfc0a251e40f3b48be22c9d82cd14273baacd787c84cb4de87c95693d1d. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c39708f-a9fe-485c-8905-7d0a3d4169b3.json and https://artists.proofprofile.net/proofs/artist/8c39708f-a9fe-485c-8905-7d0a3d4169b3.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 0x2d4fc3d177b8f6a6c9c0f8b349b87316c5345c742dfa499bd50cfc91399e64c3. 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/ATR981313937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a7c485ac8e87b5ab3f957161e336be31d4ee0d54fbb52f2146be9809ee387e. 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/ATR981313938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3022c63808393ee11e2a764372213620d1a4460774f4bec256ec5abe728611. 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/ATR981313939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67255b5061d57c77b0666670301f1a1171994d3de22af4f77718975ad68cc46. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:32:26Z), 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/ATR981313940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21a6efa1e3cda5eb01de4646aee4898d75daf5fe45bfca37177996fc88774b1. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ATR981313941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb922cea27e5e45c2080edd56fd450646ac3b1917da079a85da8141450fdb770e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ATR981313942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cd1c20322da72d68529d15e2c4f1e3e5aa5de756af93fb637fc2cd2581c9e8. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:40:30Z), 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/ATR981313943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e136695877dd54ec4998b9231a1a112f25bcc4f0fde88f00c1f4153e36bb10. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/ATR981313985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401ef7d1493c7c599259809bdc49bee8280a585e48beacf4d1fd5afca4a06139. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ATR981313986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9ca4c1eed6ec1b0754453fc52d1c3c3e7a8a517180dac1b2c6927688896842. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ATR981313987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5f5ee2f8551849cf509cff3e2bb3d422c0321eb5a86fd13b662865c48c8e82. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ATR981313988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c4d435de330b201e3f854201ba89b70920c9ed66472c57b6f298b0740d492f. 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/ATR981313989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1973150e43680732ef84bcb1ba99c1be72ca486dc8609324b76edfcfbfe56e. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/ATR981313990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7746b4da50619cdbdafe58bb4f370b43e42eb491c4c742eed625994ced3672. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ATR981313991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a0e659a3b791c5992fb109648040738ba4e1024e63785a88a4c8d5abed7635. 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/ATR981313992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad923075ca03905303d1ef670de9222a7cc004ff6cce28c1a5535e254d6f1e3. 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/ATR981313993.