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 0xaea3ef6adf82bb693d5a6b476c9c6893bae5b30342d90d288dc5313ee5a9fc9b. 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/cbb71523-87de-48a9-bfbf-62432b8db0ae.json and https://artists.proofprofile.net/proofs/artist/cbb71523-87de-48a9-bfbf-62432b8db0ae.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 0xea513321aa6f3d48c612400284cee70fea9e1c5b3d0536b8ab25a299f6a2523b. 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/TCADQ1889432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac399b13a084ee27920d65f2bb8bb0c121f5807eb4bb143e544773ec0436f2cf. 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/TCADQ1889434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b7cea5f7132e9fdeedfb2217a335e2aaa7f72f8e0272c2a2290f7fb3bd039e. 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/TCADQ1889435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd728705e95ef6037c81e111ac002346abc5373c06d0038295ccf6dcb1582690. 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/TCADP1875159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3722530a9dbf25230bba478acb1f4b669b1e1c6fb16ab60be0cec56e048f7b0. 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/TCADJ1774589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4af5a416fddc3b4e77c6a29d4a7fc28ed0a492a36d6be24a68e9ebe9d2bd0aa. 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/TCADN1818479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ac8b5766d9ce02fa6a5cdcebe8419f1225cfe1c4932b1cdaad0adcfbf182b4. 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/TCADQ1889464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f14485f98b50febc1c27dcad800760293c17e71468b74e56f150aa2a41322fe. 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/TCADQ1889471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d42accf84341526f4a2c152db21967b63096367a78c3cf76dde24f84776e8d. 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/TCADQ1889474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffea47a9cfa41305c3e905af6a3badf0bf34e39486f6c5fdc8568cab3c23d8a. 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/TCABS1492964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccefea168cf73f9aad76a3ffce87e705624c34283a25d2d0b82af1870246a21. 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/TCABS1492968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f33604eb1335817142ef41ac19beb6f0c14e0a522e131adce613431a2a13a58. 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/TCABS1492971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928c1602ba1359b3afd6236f0dfdb4c07e38f72d268c4684d47fef34632e4a58. 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/TCABS1492972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f33ae1d360de46d6ea31fa54eb8fd049b5c71dbba152b6c577271baa265b2c7. 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/TCABS1492973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f0e4aea7d9a0a97fdb0a90631e56cd47faf4d35ea1688afbbb3cae833aabd4. 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/TCABS1492975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a6117ca0bbdfb79902cecd515fb543129f89495ebf2f35efeaa88f2bdae00e. 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/TCABS1492976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dfd1a6967e22908678c371bb41ca0dd8602f670d726b9bcb79dd78f8458b88. 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/TCABS1492977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3000276ffe639661c8871d0c31c6097b8737302f33d50e3a3a92746ba4ac7e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCABS1492978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8a05dad904db4de38942c1978a810dbde7625e17a19cb03338aa6ddf0db441. 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/TCABS1492981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2e71989d87f7d11b663d05a4838a0dff19571472d6cd76938fff55601d5b71. 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/TCABS1492983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd669488f94577428bfb3d3f1eff85b8c20c7012b8de77816c7866a57687c9f49. 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/TCABS1492984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba1a2edda33190841db936b30d5b9b8f7c08a8202ca10c7d556dbb43a1ab54a. 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/TCAEU2056273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd728705e95ef6037c81e111ac002346abc5373c06d0038295ccf6dcb1582690. 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/TCADP1875159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4af5a416fddc3b4e77c6a29d4a7fc28ed0a492a36d6be24a68e9ebe9d2bd0aa. 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/TCADN1818479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3722530a9dbf25230bba478acb1f4b669b1e1c6fb16ab60be0cec56e048f7b0. 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/TCADJ1774589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f1801f83825c2d6622cd5f336cab98f972b7901f76ee16f6c5f646ee479fc0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:50:37Z), 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/QZHN92065580.