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 0xfbc5cad2ba539234d556ed1e273fc0b59f66a83ac05e80d6a060cf3f876e634e. 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/25ea029f-a2bf-4ce3-884c-011c901a002f.json and https://artists.proofprofile.net/proofs/artist/25ea029f-a2bf-4ce3-884c-011c901a002f.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 0x581e8d9fd690e0fd09c47e8a07fbd55d7d620c146c1a1b03595c464f7cf1e96b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US6WP1600212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6ab369c9a6b2edb2f64a0eae158bf96203fe5f3a149f85ef8ec20fdf95a571. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/US6WP1600214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5b06b3e67789cf9e3ab83bfbfb27d2fdd9ee701905537eeb71a1aede6953a8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US6WP1600215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379f71334fea1fc908d2a7ff9fa28f6c58c07a2202e58f7f85b83a54e617d865. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/US6WP1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae73d806a6af3087d5f3e213f143f831a5b3954faaec7e8c998b6a92139faee. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US6WP1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0525a01a0f40a50f45b7d6c54c1a6016e05bd35d55e0689b6a1c21a9944ba9. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/QZH7Y1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dff15800df1b327c2dbbff6ceaf4ac39b5a6295d2db32ec4a9699326cd7d6e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US6WP2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7b4ae8923e0a916b46ce0d4b2d35e095dc9de00492e29424102bdbed59a87a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US6WP2000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4664e945ac0deb96fa654c71d26bb11e446dcc54d47fce3986ecd138bc9037c0. 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/US6WP2200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168e6eba5ebf9ae4e4d7fa485edeb7ed1bd4fc653c29bcb12382674cc8dfda06. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/US6WP2300157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5165ce57b95d1b2a1d06df324df564fec2157819770da932f2586092978fe14a. 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/US6WP2300178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12c0540f3f5e79696862c32cac39f3ac7eeedf746b9679f8d2201facfffc037. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-17T00:00:08Z), 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/US6WP2300179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628387bb34ce959c2980a60bff4ba888f2c297638a2e7bde3c725dc0b628fff7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/US6WP2300180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9d94df5c5bfbe4c64b02766aaa7dd9fb25bac7bd34db8aec55f066aea63d87. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US6WP2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcbd3939b568feed6edd8a3e64ffcf3a9f50dc5cd9aefd6dbce1ab815533808. 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/US6WP2400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9d94df5c5bfbe4c64b02766aaa7dd9fb25bac7bd34db8aec55f066aea63d87. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US6WP2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aea56d15e47150fb345f9d8b21ff7dcb30ee4dcd25f01764d10242e3b9d6f16. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US6WP2400196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cf23f3eadc2d52650136c2d7429704f4057cc049c3d4f4f7944e399f19a7ef. 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/US6WP2400199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab4192188051acc0acdc31caeb7504988ac962ccb1707da0e86036492f68dbf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US6WP2400200.