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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a30300ecfdcfbcedc78ffff14eb3c8d7a9bc2162cd60a85adf8a47959c1d99. 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/5b8760b1-2c27-4b2f-9195-06e3880b0436.json and https://artists.proofprofile.net/proofs/artist/5b8760b1-2c27-4b2f-9195-06e3880b0436.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65312e6c571d5743bb7853d687d4a944dc11f76a6d4bb343a82471fb3b53d75f. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QMPKX1842170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71c4ce63b49fe86fcfaa571c9d54f8579cb89538b7224b16979319701e11e15. 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/QMPKX1868876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7f48f2e2c610bcafc67ee907a97694ce557c1c650a1cdb95cb11b690782ac6. 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/QMPKX1875210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5684b40a096c4ed24d172c0bb93c9d59c75fc21927bd601010ae6697b3ee6b6. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/USL4Q1807485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4210ecd6cadbc819d482d5e92f0f5f95f8aa9b22ca329446c5330494c12622e. 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/USCGJ1992178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e2ef78d3fd807cf1895a090c216248997a1696200c9cb4bd15ed181d7b4450. 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/DELJ82088903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20652e22e1ca52c768d56ef5d7dcc29c0461bc15d64c1970702b26e07a518f75. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZFYY2027699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fc4416ebdbbe1d7b4e818db5b3a087a9a507ca0b8578ad06ffff9f66f7a741. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USANG2200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128fb271700e632eeca11e93ec59401b3cb1c20ad81e04533d40876daafb14f0. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/DEQ022274615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e1d9d181b7db62c9d72473142ab990943a9103a8d4629b9f08df45e0393667. 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/QM3DF2210543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983ace922346159e3eba0b59c7a9f0a6140c293e95f3a8e6515fb2919debfee4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US3DF1954271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0192235de3233487d53cca32dd4ce2a36e79e8c01ec136d2911fcfd44e6c9638. 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/USANG1923770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe29458fab0329a4783764ccf925c43c2af46d00709ca4facea271c87379bd66. 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/DEQ022012845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28698d26ee26544eec7748abc26137c0d967d9bf703c5bde001f34e876acf1f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US3DF2211945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8589cb75fa07d41d59b85a2777fd8594f010c6aaaf942042040869266d42f36. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US3DF2274734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e0697b9b723331a6f59d481f679d9db5fe49e6162c5bea1174432459dd8b06. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US3DF1988178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e03af1206f6e9d84d88d2b98c2d24cfabe9c6835f5d992adac0b9134bf36466. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USANG1909338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdfdbbc774be3ee6e090d0df6b11e663486f1c9dd720144fe0044b0ffb3c953. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US3DF2176094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e8e28a3925cf8da6c89ec1bbdbf31d8927adf67d27bd4fd4c39a5b83e88e47. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USANG2233420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9c2a13b5a2e34cc15420a7013c6d2a88391e6ae17d545f9c4c9711c11b55b4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/US3DF2260990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8586cc976e3fede8f5158cdd9800832c2b6fbb13c56e3a30ec85282bb1b75e. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/CH6541885978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892cde3d418cc0a06aac51bec14039ff58ea22a889282161198f53463b98deba. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM24S1827399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58aaa68fbc2792598eda695a8974161b3aa46bb6b8ec4775593877d0c5d1b5a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH6541941303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35db5c50185279ebd2b86aa536ce187a3ee05b526a0ee50ad97ed8ad95ba5232. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USANG2471554.