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 0xfa9ea7c0fe0ede3da3accbaa79c3886f4c136ae3995e13163a3901ee632da65d. 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/254e0acf-965f-4cf0-973f-6b0fb2c435db.json and https://artists.proofprofile.net/proofs/artist/254e0acf-965f-4cf0-973f-6b0fb2c435db.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 0xdc2f672b9cda1e3d79090ed89d0c04fb4aa1f82477f60f43612a8cd1d05af793. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:24:10Z), 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/USHM91982316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8830ccc53903003921b2cd6951a3b31288f1cdc37a48f799bcd670f80afa7b3. 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/USHM91982318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc77cf3e4ffabc5fbd98cfe300c8271669ff3ed7c0f8d42f7d0362fd4bb447a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USHM91982323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf936e6c1b9532ac50f8fb530e000544aa18233440c1a0b73dcfc65f83d7b4136. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USDY42066024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9468dc970975190446a7966b3d5c28ee5b658b707c3989d2bf2462e8b3917803. 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/USL4Q2091466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9422ef62dacb7c52fc0ba8133de4c9e38f488ccb5bf90fb0f3d788862070f8. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:26:46Z), 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/USL4Q2091471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6352bb3b1f80c1a7537723ebd96cf11ff15db0e36838713f23940d02cfa82aca. 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/USCGJ2329842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1bcc35406865511f7c325bd316aa6d85217e67930b8878dd8df5e46eca83c2. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/USMH92365139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ed2eb44970492b695e6df62a6b8751ce185af05d38e2b6d8dce28ec26be0af. 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/USX9P2362354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5481c1fac373501eb8e3afa38d48839b52c772ce7c4f56804cf9927a021b2b2a. 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/USCGJ2427133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0ce014d6c816e505bb9fdd81a580b981e281bbe6f418054e123d805a5df8a0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM22431993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87e99faaafb5b280098b4fb04ebaec725959fbfade88b97727346b29062899c. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USHM22431995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fddc9850b2d0fa18642e8696c663fe45c42568cda67717a50cb6cc6bf7c2c59. 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/USHM92434233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1bcc35406865511f7c325bd316aa6d85217e67930b8878dd8df5e46eca83c2. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:47:32Z), 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/USMH92365139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f49b522c984119f96e942a311c9f44f628b41e32861aa72dea6fb4e4f4a929a. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/USHM22431994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ed2eb44970492b695e6df62a6b8751ce185af05d38e2b6d8dce28ec26be0af. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/USX9P2362354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ded7d1f3b9b56f8c71a7176d40a5320cbf43d662bc90ce7f33d48123a92682. 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/USCGJ2427132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5481c1fac373501eb8e3afa38d48839b52c772ce7c4f56804cf9927a021b2b2a. 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/USCGJ2427133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0ce014d6c816e505bb9fdd81a580b981e281bbe6f418054e123d805a5df8a0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USHM22431993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fddc9850b2d0fa18642e8696c663fe45c42568cda67717a50cb6cc6bf7c2c59. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USHM92434233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb92fc61a2ec8319c3594757141da6e6be1b976c9edc3f106e2562f1498ae292. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:43:20Z), 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/USL4Q2468450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a862a96993cb47843504a18ece609deb434f8f4857f2a8b9a02dbabea60ae4. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:41:30Z), 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/USY242467717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa679adaaecd96c78bdd2a5720f8e13423cb6f1b2bf791c3e4bd3fe59d3ed97cd. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USDY42547296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d5aef25abe80780e6903521e6268358b2706b1104c94f9312b0059ff656c93. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USDY42508193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9a1fa185cfb081010ac636feacd864d58e670a882449437029a853356e54b0. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USY242478266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8aa7bb61eb4166f5ebda65613cad6795d9b9bf40f8b2de2396973a93ab411c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QT3TB2416042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227cb6be394aa3e542a78153a18d5eeb41a6ff940e38ee6594ec9d18e9a6d3c8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USHM22325063.