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 0x45c1f87ff697abfc319c2f8a23cc1e4eca1b4adfd7ea95c3a53a98a7af9210ba. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00d9492b-5f1a-4398-8ca3-d039d977532d.json and https://artists.proofprofile.net/proofs/artist/00d9492b-5f1a-4398-8ca3-d039d977532d.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 0x0a8605fd4279a91f54c867b7b6cfbda92033ac48e0eb1f4b0616fb5a1a3c36d5. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/CNUM72100268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888cbb495aa7dcb32c05eea60743b1ee9e3b9fdace1900e134c812073ff0f569. 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/CNUM72200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bd38e454805cbbfd6784eb01c67b71da10a45f8019214dbb4adeca0b108355. 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/FR59R2457686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9fa0cafee697dd1e35fd3b96a15a793c171df6fe1ab6b3eb501e86b0fa6201. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR96X2415984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658533d1296ad2c6a00ded4bc4e70ea4e2f06e060de10ca21d24688f8472c95a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CNUM72300025.
Carnival of the Animals, R. 125: Ib. Royal March of the Lion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7cf8ec2a78bcb87f473f878589b4acf785f5de4f99c676b25815bb3d3388de. 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/DEN962334802.
Carnival of the Animals, R. 125: II. Hens and Cocks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5583f156a6b39d223cdd4e58ba004d7560f9517992dd62221e2751938c45e76e. 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/DEN962334803.
Carnival of the Animals, R. 125: III. Wild Asses
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5235d38ebab31b1f241e61dcf06e7d03c4042b03c5242b959e01a69deaeeb18. 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/DEN962334804.
Carnival of the Animals, R. 125: V. The Elephant
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557f97804da27fe337030d92ef2d908607cc4c5da286b2cc2f81c86cb9781c2d. 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/DEN962334806.
Carnival of the Animals, R. 125: VI. Kangaroos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a952feaa7921975df239c13ca8acd04e79148da249396824a8808d67c2662f. 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/DEN962334807.
Carnival of the Animals, R. 125: VII. Aquarium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a70bf14416e934ac4e510579e1c14e052eb4fbab40e2c8b9a336c6b32e8b0f. 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/DEN962334808.
Carnival of the Animals, R. 125: IX. The Cuckoo in the Depths of the Woods
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f40ac1b308cb6cf132c01f3072abeeb6031e96ec3e9a1d2504a712348b5101. 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/DEN962334810.
Carnival of the Animals, R. 125: X. Aviary
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7be0f89cc69fee973d7c4b9209fd55395e219c5d07458c525f962168999725. 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/DEN962334811.
Carnival of the Animals, R. 125: XI. Pianists
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c0f18c1772f07d65e87e0648c67b44692ac647e1bccf12aba20077d721585a. 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/DEN962334812.
Carnival of the Animals, R. 125: XII. Fossils
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d57f9160353bf8a2b74c6b000e1c2a02d9805eb6f2c8c888ecdb123bd23e83. 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/DEN962334813.
Carnival of the Animals, R. 125: XIII. The Swan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e88c3ba5029499eed14d01a18131fae51354c54625b88ffa70373a75ea95fa3. 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/DEN962334814.
Carnival of the Animals, R. 125: XIV. Finale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cdae7b056f95febcbe4bd4ff3815cf05dd28091721e1380d81657f4742474f. 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/DEN962334815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8e452269269998c49ea1e335529bbec9df88d8cf1369e442ffb6bbc90aeeed. 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/DEN962302681.
Carnival of the Animals, R. 125: Ia. Introduction
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b3b65281f3d17dcd2bf6ac10b7c270b39dbb9e2cde2351aba3a4caf9d7cc25. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:07:51Z), 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/DEN962334801.
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 0x1bb02c963137deb958aef1b6d65c89918c4172ec93e13404a90a6e9dcec01322. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR59R2451972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695214cf9fc72d7b1f1071491831c219dc7b58ff839aa5e8be27a07f6eb587e9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR59R2457690.