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 0xc61a4ab575a4aefefd09cfa19e23e48c60d4b701639eef2e1e04ee3a13569c89. 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/cec03325-4f5d-41ee-ae6e-4c26973efb2f.json and https://artists.proofprofile.net/proofs/artist/cec03325-4f5d-41ee-ae6e-4c26973efb2f.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 0x360c98a0214a4aad6740dbf5d95ca593f7d9a065c18a74ed6f6e25a145ed1226. 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/FR2X41478589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711e827635beb9322464ca4efa1535e484222d839923c62e8b257052d4be0f16. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:56:28Z), 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/FR10S1677995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf4fa7b860f86a5bcd46be18597d3e70043338da83672e55817a2a8753225d0. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/FR10S1677993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66d197919cf378f21e4bc19129fddbeaddca273ece2ed317b949c5795f56b95. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR96X1861144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5d65aef07161f3495ba2295939eaabfbf2bf626ac97a06e1c02e5c70d08700. 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/FRX282146748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b479fc469e87d05e3e12f4a87b0118d55863286553b2c02b5e843d67287fc3. 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/QZFZ21932778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5903f34d3d076285b4d30d1fcf1bec2aea7a7707a4d65f7858d768e34ae98580. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/FRX762138773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb7ca9b6bc6c304d30b5382b9a0312944f8516ca882537b72bbf2a9b42ee37a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:08:04Z), 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/FRX762196930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2135d82b3a658ce7d08f8bc1040824909d70c18dd7aec686137e9794561ae8. 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/FR2X42270216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439a8045ae7366d734da2d430f5129db3392d22a0dacd420c42574fbfabfa4a6. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:54:17Z), 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/FR59R2265416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0834dc312c1cf7e7f33e8a3fedfb889a6e54b1b1543da2ff58eb1c124b87551b. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DGA062222028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b30cb06241c21ca659da329ea6b6e872c4f88ccff9a6934f9301608f007b80. 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/DGA072219460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce2dfda84207e2fd5e7cde07a71a30cea38f70ab387596cc88fdff39a474f8c. 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/DGA072277691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845bc47b0578850b43ed390c3a0d5caea76c672fac6f8e68e03d9131e70fc58d. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DGA0L2348269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ed53de6a823f6d801596095a8d3bf6a5ef8f00442258e7b1696db3a9710d25. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:56:06Z), 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/DGA0P2382513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd261c11f5367ee9e6f79c05bcf6abd44a384d5a85f8099bc2ecf532c1d6100e3. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DGA0P2382514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39da4c1daccf231a1f8abad114e71879bccb6b7b28a9435f9da6d5a84c0a1781. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:36:38Z), 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/DGA0P2382515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781d47587ea6c97ae959a2700a03257c6dd960a9f74c86c79feb7c2ea5e10e24. 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/QZZ792479291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc21310532d72548019a8e127eb3c8cd0d642f898cbc1e623e661e6723b4f5a. 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/QZS642583879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5046572738315194469d88517bfd3880f7a44692ea89ef9b2616d5a789cc087d. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:01:36Z), 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/QZZ7M2499620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052b43b8e866138e8c9154e022164f45eb1fd27c67c08af11253e82305682b80. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7M2499621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de7666ea1c4486f0ffc350aec612bff126bc8d13ef1da6b258059aad17940a5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7M2499622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cb3e2bc20948094b509aed9e8f9cfb1d05cb84aa9b2e41c5833d7a927fe858. 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/QZZ7M2499623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a80e20e8b48763ad94453959076f613bb4333442e2758081ea842d811560f0. 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/QZXLZ2408674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577d7dde1c03125aa6028e86a44e8083d9fc069fb847ce6d2797e0f028af7da2. 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/QZK6K2536606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6db187070b1543fb314d14ff0b334cf0893c39a731b20f83dfbde963c15217. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:41:27Z), 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/QZTB52572673.