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 0xc0690f7298ad733fe6d99f8e81c856424cf3e15e4e235344606147ac14f236f5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03f2a9bd-4373-4fab-9351-42df55b8895b.json and https://artists.proofprofile.net/proofs/artist/03f2a9bd-4373-4fab-9351-42df55b8895b.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 0x6e1883575b4e0aa994679f460cd977ce4d56510a9b95c3f0998c7e4b6b898ccd. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZES81935548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480ebe787b23c67a0dac0e1ef360147987ea335bcf16aa683206e1e77ee1735f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZK6P1968789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e54ae4ebcd3fa989a56f33bcdeaf0c3e3d04f13f0b180e5bd1e818ee61eef4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA62210385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f42bde36b2afe2217600e59442e22620bcb7fc8044a9e8b5245e39401b923cc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:19:16Z), 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/QZHN32227329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ef4a9768c0d4099ced76c13f6724b7d4903b0cac4038c58df92ae700fb9761. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWS2224743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9b2d31d58150a4095d9c340546c7fc570eddc7c29ba39aa17b4982c09376a4. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZK6H2355130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6aad256fae0d52e61298a2e291c611d0389b009111c6a0e610a7ebe7aec56c9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFZ22492381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6c8a4737a68b7b4d56da1f15bc8492a9e017576d9e9457eb8df05d57c8f59b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFZ22492382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03583e254af2d1d59e8e11093b6d1ab03ea82c6390c765258b166111958f3dbf. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFZ22492384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d97b9ac9ab2d45550b8bb007a91c39132a929ae09cd2c457050ff62dfe8b338. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:54:42Z), 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/QZHN32482165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e12448119276054dabde99c648107678e80aa595fb5e534e4dec1ba04b960eb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:12:19Z), 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/QZNWS2416237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44636e254c556aac713b543ae0010dd3b632ca6d0028a8da3c9a41eb7fbbd5c6. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTAZ2592536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d101904891374446f9d1276dc8419e567bf8b0b874cbed66f4dac10ee1eb669. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:01:51Z), 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/QZTBA2525111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a93638a5dc5f292214f4207a7e7eea0e9f28d85d83688c48f21030ec967879a. 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/QZTBA2525113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc25a9b9af105fb6381b49a971c53dc3c220b0c3b168abc710d23bc31e0e183a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTBA2525114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfc7829d4bdc130a0aaa285b5cdba4f777a42724fdf867e55d8d193372f5b9d. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZTBA2525115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbdc9d60e2f04ed9b12a9fba78824fc1b465ba3411c93a3f7c9774009af38aa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFV2527896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091e895147fe65f29018019a4bec311d86b08c1e3b55287addbb25f7f08ed6ee. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ7T2543485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d69ce2a8030f12ea64388e77498726fa530d091be7cbd413ca4dcf8be43895. 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/USGOT1862028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc886b0cb9ea67b87352fb4e4e500d84b4ab7747de730243d966e9ebd29d9cc8f. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TCAEA1853502.
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