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 0x0e663be4bbb531ec400c22a31943460317e2abd630a2b16104df57e49df24bd9. 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/7e8701e0-d04b-46c2-b58d-17e707fba66d.json and https://artists.proofprofile.net/proofs/artist/7e8701e0-d04b-46c2-b58d-17e707fba66d.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 0xfc33ca29bcebcf97dfae9c89ff81afb7a34714bd1b170e36ede39fb29268b1c4. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ES71G1759735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c00f9c7401a69f55094433495fbe3a20b9a2d12a4dff69755746f278b4ec24. 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/ES09S2000147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71d1c8f1f786f6d617b9ae44f7325b7afe23e7aeef0b10ade399e5ce8d22e70. 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/ES09S2000148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb615e79fa4b66b57aa2d0940cefc7da865032a88b6654bf02ce1efeab73dbbc0. 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/ES09S2000151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6154afec05341c27485dd637bb3a6bc5a1facc5c458d5ac7733f5ce6b26f2093. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES71G2217708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd009198c3481050b6c300ac157be3cff04601fa391209c25cc1724d179795f30. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/ES71G2217710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa104a7d7667d5094fcab191ae9b2064cbe9149f76d1c2e939658b45fe3551176. 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/ES71G2217711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c6a7642e36bd1fe930c9b6907f507cb073c275f0a94d84b58b70b36e69b4b2. 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/ES71G2217714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e70b0571cd9469b136562c4b70d9b044412d1faa4ec6442f8a2d1823695c876. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:57:12Z), 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/ES71G2217715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41650adda5b44c7e4c9a6e2e001bb7d5c27337a34f264381979b29e4a2a39345. 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/ES71G2217716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28da376711ee3982e77913d823b3c98d55078f2e307237e052be77673776f2ef. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ES5702400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5073c5b43993a966c6f9cea322592569c7f21764be05c35f10afd2530b6fb60a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:30:39Z), 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/ES5702400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c44f4ec7c19601cba235efcf8b0c149b0f8c0f800d263276bd2eac3423d8f7. 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/ES5702400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8307f2c8c9286538c70338a521e3c83cf950581e86a4f536f34dab2656a59fc9. 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/ES5702400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03df1ed3510da391ec04ce9aa2282f3f990e988ca137b12b8bdff7c229501793. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ES5702400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa054e159a65789a12458d72800b1aa35d9d0e031751b1bf47f6905a51afac09f. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ES5702400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3436d9942abfc47c6d5badf09d0fce383ebb11ea9d3a3d72be88795cc4cd283a. 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/ES5702400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cabde5d712a12c7ba961e752c45a65e71d632c152871ee4f574e297e3e02e57. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ES79A2523112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375b4a5433a71cc62f4f83b01cc164b75951f69cad2d6801f6987967c9b79fc2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES79A2523109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc215c4ed39f2ee8bc80cca561721792550905b5f828ea663bd18de266e71e39a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ES79A2523102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cabde5d712a12c7ba961e752c45a65e71d632c152871ee4f574e297e3e02e57. 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/ES79A2523112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07baaef48b5c631c04c6896135b2d040e9d121c485dfe039949af40c065bfa4f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES31E2305295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42107664216713fc28bf3d9074bd3b4f5b463004f4a3c6d7d3e1cd0669dc7ef. 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/ES31E2306319.