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 0x42aedd5740f69e879d22e6fb0973fbf0d7921b2a4d92bad5c15ede065e8ae314. 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/89eb7d1d-e189-49a0-b50b-385c843671fa.json and https://artists.proofprofile.net/proofs/artist/89eb7d1d-e189-49a0-b50b-385c843671fa.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 0x7c1ddebd60a8a338ae8ec1c523fa47adbafbf2332ca9b1176a821d07aa935bfc. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZDA61810500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b93db061ae52e9e33663493327ea4ea1c0e98d9d48343a16b0df5d6818a209. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZDA61810506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062b53806780b803f144937b3740a747fa88c65167c16e2036d2820950f04035. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDA61810507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f33a01b9f8f0c341ffa9b1a7e033269236115d66837b9ab74b7f5be467c9863. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:26:50Z), 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/QZES72210183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863a39eff540df95c8e4f1c7f214834ed9539779923156701f2e4a6d5970a0e7. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZES72210184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7decc20c903e6b8da8eb2a4a70421d3e5a0d1bd2d6cd1ef2e5cfe8cfeaf60720. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:39:44Z), 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/QZES72210185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe3520bebdc5d5322dd2897a02ec35f8bd29cbd2fba814a81c95995e83cf29b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES72210186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759518c59478d6c7e7a0520f841beafed353009419c6f10a9a7bec571206636c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZES72210187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f22dfdf6679b6f7d6476750c3950a1dcb2a8132c500b1d39c4fc4e1612623b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:16:28Z), 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/QZES72210188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f56dbb719a684943cbcffe17e7e361e5ef105e7f510fe2444b59da6ac65b659. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES72211950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96acee54c7a2a561e03171423fc951ad2d1f129666d2b3fed712eb2baf9bd5cd. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:40:39Z), 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/QZK6G2253190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a67ad37788f008c9282a7ba223a9f5e51e6d599e31ebd8e9a646ef0bdfe487c. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:48:55Z), 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/QZK6G2253191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8756622cf84a13660b0524dc2c42623d99452af95abd51fbe21a5ac035059b2. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZK6G2253195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef11c33ad123ae3d79a6df830bd867b31f64896104f76f01572fe31f38510424. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZK6G2253196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe682a8e73cc005b5be36be1a4d29d18df7cfc9ab8de614c1610c35a0709c8da4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6G2253198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5622ef96de88f472ab960b252fb33f70eac2d2fdc4d29727e55185befcb8f889. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHN62585424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03b27fff1985a81d047ce2f7a665b9caba15e9999c4749a11724deb0a158539. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:00:08Z), 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/QZWFF2518804.