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 0x01140c3ca89ccef7798bd51a6f3507539d9f6f095a4a56427d707e729048a6d0. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/627a7884-8f1a-4ae5-b3b0-a99b4a4c9a98.json and https://artists.proofprofile.net/proofs/artist/627a7884-8f1a-4ae5-b3b0-a99b4a4c9a98.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 0xd7c609f2ad557418302d3f6eaf450df8ea926470528c350dd7edd238d5c7d318. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:45:55Z), 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/DEPI82402756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7e810ae843eedcf7370f8386c89cf3e5b7a90794dcff28e0ab9653d3b6bc4f. 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/DEPI82404453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0b74767654c130925dfe3ff9a5a5a6e80fbdc05f2f52ae7b3b9ee79ca02791. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/CAQOI2411037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ab32c2ce34c4df73648a240307d1aa7c4704b805b6d1abbc80d0e25349d12f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/CAQOI2410895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee4d87febc3a37f00f297b7bd794c0f4856d3d06be87e9709abe713de4c6c4f. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/CAQOI2411034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8849948dbe6f5f876c3f9c0bdd0da65b132e8651e9b467d8fe6d22fb110550. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/CAQOI2411033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0d84a2f823d357a33acaa2eacd3a0e06e80d76dc4a866196c35fdf60596da9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:58:26Z), 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/CAQOI2410933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefca0b1f1c428fd01879180ceb5bde0215b645ba811e93fcca611162faec2bbd. 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/CAQOI2410995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab53aa1eba96eced914d970608ce5d20aae9d83dd524361f9420f488dae3019c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CAQOI2410897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41936b8f21f182ceed0e1c871a5f715ca11d86c9e27c95bc1a1f8b9f5a6900f3. 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/CAQOI2411035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba0fb6dc0cae389f50bc8dbe8e454bb10431ba7a3a835d36077bd95c3ee55bf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CAQOI2411038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf642d3e9de32effba02877343a139065dc12577f06b6ea3c505a59020ec556e0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:55:43Z), 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/CAQOI2410992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9787b508be3c0e42a44bdda433035aecf517505d0713e4a61eafcf98d6139826. 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/CAQOI2410993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed3a6666e09768e5572ea604cdb1df60c489e4cc7db7212b2f0d28fe222c3ed. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CAQOI2410996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed73b9b98b8274b51e903f42b8a1bec3bc67ae29cb93c4fb6aafa31e516d9bf6. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CAQOI2410934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66612028c95e99ace4d18b876dc7fae65b52aaf3a6f70d59fbe87e618c3bcbe2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:47Z), 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/CAQOI2410896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216808aa0b6146adeae7c816d71607ba82901b7e1ca7b9c478a0719a97a526b8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CAQOI2410997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ff3a015d28c987c1d240d92fa8d208c0daec903f0b26daab827788f8cd475d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:23:24Z), 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/CAQOI2411032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801e6068ba394606c1f81a876cffed7cf7204d64c462b42c7c7dbec2f4ce6dc3. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/CAQOI2410994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edb469a50fcb05795657c4ed44d7354801d16dc52aabf94c5ed68b38cc5113e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CAQOI2410998.