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 0x784a4127f19bcae5912875c1458aca0ad702bf76dd11a9f8f54266a72b28295e. 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/26800374-11ed-4116-80da-d450ecb1ff83.json and https://artists.proofprofile.net/proofs/artist/26800374-11ed-4116-80da-d450ecb1ff83.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 0xe48ad2fc212f9f74ddda652afd0c5213fac9bf807de2e28e1d793caebd30891e. 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/GBKQU2046048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5324d02c94b87867ef44f5ff86449d4f911b0f2698619b452fcada80ec3313f. 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/FR9W11917955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf00e7175c69a547289be71a52f150646ac4f6d21ccddb9b0ac696c6f42450c. 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/FR9W11917957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89c45f7245896790d0a197455030a091a8e88ef34f89fbf857332212f8f70fb. 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/FR9W11917962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0968cf1783fec4e916793b19e621fec93b3393e21bd510ecb296a9a7b71e389f. 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/FR9W11917958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5929ecc3889f3eb3c02d7d3380582a691afadc0b3132b710f1be0206f2a7626b. 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/FR6V82539525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc675ec282bc6cd5d1e9601a8f8c341cd1097229ee5adbe0b349f4d73c2dffb87. 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/FR6V82539527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528f32a081497e5464fce3db93cb1215552979b6bdd086f72671da922994e56c. 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/GBKQU2419521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc57cef09620fa4c9a34b4d75bdb60b97c970be824b46ce98b34a2255604484. 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/GBKQU2419524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf67151b4f54f6c22eb5b2e5465e78c3e33a08abadca1b6059b378b71aa82b03. 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/GBKQU2229428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ad798174aad179065fa6f1d9fa7502cc77abd0b99fefe7e54457f8d6352ba7. 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/FR9W12142791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e5ccb505c6f7ec721ba5702f2a6e91fac0963696055265265031fa3943d4ab. 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/DEWN71700234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff554f93217a6f458a458602e4c0a14f2b7515b8e854881ffa9d077f3165d667. 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/FR9W11928588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a28f4d8b378e978454ab0cdc70c969983b2f2e53ca86f5fc65fe97ccb4cafa7. 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/FR9W11928589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b05bdc861355b305443f3b4d3ec12a302e2819e6df797ce30b8c52c71003ad. 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/GBKQU1999792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7a71761cb8e6fc40f32bce543269e707de7000270497bcc3fb5ccdd810f89d. 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/FR9W11917963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d6ac095f14c61d2cacd7463d13e287f8d5a9ce02c081adb279f00fff7efc02. 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/GBKQU1609871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51086bbbf4a26ffff7420c5b097e9a42cfe63a8dd02a4234f01773888b42245. 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/GBKQU1609874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2b0e2fd934d4e9f3cdc4281b695751ba07f4907a2b9131aa46c48e74b286fc. 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/GBWUL2528014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61daae413777f69d039f8150aea931d8183a37323d8fc0fa422a2e919e125813. 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/GBWUL2528051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4abf208f49cf65436538c6fb7f47faa40b7832ce6fcec52e28c640ce48fea4f. 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/GBWUL2528066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25fccc6f371b27a8256810cd3d2dcd5965e4d9ec671284996b47a4134a0d7c5. 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/ITK252580000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fbbbf6dd8086134eac367310ddf04819b9ecb19c37d6b3f2c6ae1a9510fd3e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:15:09Z), 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/ITK252580001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65939eed7127ced210a88da31058f4853f4632ff3032879e170718aea8a62b7d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEU672400748.