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 0x445e132b0acbbaabcbee79205a80ba672c62d46876b1dfda91c961e7a5ad10fb. 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/25385256-9084-4085-899e-fec772c0de62.json and https://artists.proofprofile.net/proofs/artist/25385256-9084-4085-899e-fec772c0de62.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Take 4 - Echo - Hideyuki Hashimoto Rework
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 0x4497c38a05d07e6591e54f60bdb9db015164b0201fc43ad82fe203e7e7e0f2f4. 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/DEEK22200005.
Melancholia - Dominique Charpentier Rework
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede0d69bdd6dd6332c2e64f3b56fb882d77b77f1c9aacc27fd1a95537591edd2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEEK22200006.
Life Goes On - Hideyuki Hashimoto Rework
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918ed6d97be1ac55d33c7ba2988f75b886e8bfcbc2bd6d1039398f5c65990d15. 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/DEEK22200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fca6962590f45a992c9794744555178296c32778ad31a3fd786dfe811fc3fa. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEEK22200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d54627919508de29b33c2b7bde8b34ab9b1fb734379b09998dde2a71a49a7b. 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/DEEK22200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc6a39c56783c45f5e2b5fb002553ffd7a3d10f599407d0f3f2a8a9438dfe02. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEEK22200010.
For Better, for Worse - Mattia Vlad Morleo Rework
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad10a8bd2cf83adadfcf36f8d4619eee10dc0351e417ebaea7c4cc451df5d8c9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEEK22200004.
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
Take 9 - Planes - Barry Hudson-Taylor Rework
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe111c48c33e3644a80f3437724dabb9f467807876565d36af540b6d9a56e3500. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEEK22200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a1c7f3c64b40d98a30c67f2d4f2a4c8fc5b76fa2e25cdbb9c09cfd8c1599f2. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DEEK22200012.
Catch The Night In Marble - Hideyuki Hashimoto Rework
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949df19d5c4eab5753b85910887d8b46a8ca0b867709de118acf51026b40e769. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEEK22300196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c77fd42d43f00b7b127468c77b34518e1cdf2677904463ee4b0ebbbf8be7b5. 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/DEEK22300197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658c00c3e2513c28665f1997aa412a5d19ae15ef66c044c602214384722880e0. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/DEEK22300198.
Last Waltz #2 - Megan Perry Fisher Rework
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa9a647877617bd2503584a2c331382ba268fa4898943de9fd6b182b99c34ec. 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/DEEK22300199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a01628a2fcf5bdb7125819b96b82650408cc78b7ab6b7760e7a6b1887bebb4. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/DEEK22300200.
Eunoia's Theme - Mattia Vlad Morleo Rework
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceede33c9d31518e3b48ea735aeae327f25aadc4b67539c40f4054329b2a722d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEEK22300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af0e0e8fd95f363aa014b990efa511991c76ad4e7b711ca68f7c6dfa7aa15f8. 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/DEEK22300203.
Echo, At Last - Hideyuki Hashimoto Rework
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4338953718d5e4dab275107fcf4d833f73d82d60c7ca58863da74cd1668228. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEEK22300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6043703553f5519603689ad4e95d4a40507b60206e95dd56d457238cdb7cdd. 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/DEEK22300205.
Eunoia's Theme - Daniel Rosenholm Rework
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec3f0f910612d09497f87b12302e8bf38bddb0146447a10a1945769df9f0856. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEEK22300206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd89c0394fd7a21e8b2ac10a92e8aafe726aa3e0a70048f963cc54d324f93efa. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEEK22300202.