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 0xd26156ece10286900ff9dc4d7ecb758142e6542fef55ec43b6066632768be51d. 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/b0e09139-4f6e-4150-9fcc-c72e4902ed31.json and https://artists.proofprofile.net/proofs/artist/b0e09139-4f6e-4150-9fcc-c72e4902ed31.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 0x160431511433baff71555a87a065f8c3b377c77fa000349db93fc1f28984f57d. 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/BCPEK2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160431511433baff71555a87a065f8c3b377c77fa000349db93fc1f28984f57d. 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/BCPEK2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6f7e8574f09d013a40a61c3ec528c4b3f09063c7746fa32a226b2faeceb63a. 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/BRUM71902284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cede1e8191583a2bce23a5264c5d4ab402888b481d4f4112e4adabb0a3b689. 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/BCPEK2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2e3c99aa0a7bbc9da7ab7870cea5f2fcfc2f0155f028095b462003643f8a4f. 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/BCPEK2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6686932d5c5bf858880d7da9d3e8eedc739c3ee6ac37cd77a975fb52c616ce95. 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/BCPEK2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160431511433baff71555a87a065f8c3b377c77fa000349db93fc1f28984f57d. 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/BCPEK2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070292e3113bf6074242a1a64296120f21be8a9adb07fdc8b136e9b93ea9f25b. 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/BCPEK2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6686932d5c5bf858880d7da9d3e8eedc739c3ee6ac37cd77a975fb52c616ce95. 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/BCPEK2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2e3c99aa0a7bbc9da7ab7870cea5f2fcfc2f0155f028095b462003643f8a4f. 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/BCPEK2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6875fb985f4c38313e24491304941641c9cc35f7670f55f05f8915d5a9800f28. 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/BCPEK2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6875fb985f4c38313e24491304941641c9cc35f7670f55f05f8915d5a9800f28. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCPEK2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd234654cb2a0113403756d1098f85f9d95d10a67a34beb1043a33ca5fd41a78. 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/BCPEK2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe37ae975eb301799e9e563042e44beae36d6cb11516cfa906ca80a09bfa801c. 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/BCPEK2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a2911ee868bfb6dd2eb7139c6fbaf58cf9185add74740aef82bf995dde65e1. 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/BCPEK2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f676e2f31bfe7ecc8d8bf35047002580c29f1a02a9e74652b6e76c494a29cb. 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/BCPEK2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b173c6374a2bac10859c77e572b5ff66d6eb9a4c49c1cdb41c2d7ab01101e1. 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/BCPEK2000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fcbc85e3ec6998e302206e2b52c23726ee9db9d3a221d3eacfdc9cdc5086b7. 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/BCPEK2000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0085a51728c5343dab90c64f5a822a511963509a10f08728d56e284f240912bd. 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/BCPEK2000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80415dd6130371bef58109f4bd1f44c482a8dba79d1424502398151b9225f83. 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/BCPEK2000035.