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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabec57d24b4c9609dffdb2adfbf45230c28e3e21833e2631f3d4410a7682b41. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8d2b94c-fc47-4440-83ff-036df4985977.json and https://artists.proofprofile.net/proofs/artist/b8d2b94c-fc47-4440-83ff-036df4985977.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dec295f978aaccde011276b19319aec1c89d6043c5b1b8dc06aa14de1db325. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USL4Q2233538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100fcbf56ccd38332f6f01381f9eb39a395ce5deca065db65b552405c4fda42c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USL4Q2233540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cad272d301dd11c12e385072ea9ad0a01f4c8e54b4927d1065ec8dee2235490. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/USL4Q2233545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b910b465684580e355b5ea6900ecf3f8b6996c8296d8d8d950fb5116c2cf41c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USL4Q2233546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0286a1efe8781140ca7add3a86f13c952da7ef18bc2c1cae31730ab43a720d49. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USL4Q2233549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddde8b8b1f22d063cc7992b2c0079caa8fc5fca87899b1b038d9b341b01ef97a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USL4Q2233553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfd9f72a6565a53330709878dfa4bd48d5c4c9013a1825d16ccb5611b0e0bcb. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USL4Q2233555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bd8ca8e4bb4bee989a7f076f7c73b0dd44f849b9649f4b80cf74f5cbb98f98. 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/USL4Q2233558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d58e8d2de89e98b1cb95526d564c2c457109add6ad42e55503415c7a89f1f50. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USL4Q2233559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833181598e4467f74d38312fc0520fcfc9e59feb128d7bfa5255cd131734b539. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USHM22379356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15239f7e04f7f09d58a4a42396f17950d79b39d93520b7ed8045870a63c39307. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/USHM22379359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41c49acca0aea2f5bae1214e7d617efbee305c318696611fe3bfafcc30191f0. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/USHM22379360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545c3b946ea4286801c73bb20a95e78b662f448a1bb26d78ae3b609920761d94. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/USHM22379361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4039c1c15d4c6277ddf236f50791d6d356f2b8099dba5e2572f424adf68f951a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USHM22379362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57a0ef1fa16d68f71f7c7d295bfb4576fd4c2db8ae586d3625610d52412cf32. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/USHM22379363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c0e1d628135b99ec42e36ef43157c8777ffd85eef8e694cdf75d0e0f2076cb. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USHM22379364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8202e5b738a5024d69db7ae77d7adf7a5047431821cfabfd3d0148eef6e4994. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM22379365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f1c204061d0329f65f4b5d857052e187a6a7099a37d1221b7cc5dc92bd4f53. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USHM22379366.
Serenade Korceare In Grai Romanesc (vol 1)