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 0xe4d209bcc672ca80b04af311b7e2f770da6bb1a76fd3bc5ad6c19830ea4ce989. 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/d1358408-3b8e-4105-a855-36f62bac8a83.json and https://artists.proofprofile.net/proofs/artist/d1358408-3b8e-4105-a855-36f62bac8a83.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 0xb48734eb645d0ee215765e96c5dd4e51a5cfa3db64a9e6931283075fd3974e4f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZNJX2574821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6efa0ae543358641a30905a9b80d1e1e72b045107da9ea45a65623a4ce64595. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJX2574822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91db97441fca7d10f07d3adeb2d27cde9632b6275eb3d8f705f0c69936ffc030. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLM1935021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d2dbb5fba9a41750a2a26a53b3a573af84cf909ac8cd04b9f60c0fbd546037. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHZ41930199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377ab7cd313fef373224e74798a181ba0b115e94f0cfaa48ef09f897459de7c0. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/QZHZ41930200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b5b9b45ebffa4ca16adc54cc5a6589ae4d532df1ceacddad219ce535998097. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZHZ41930204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88dead5b5c60c6ec61d772bd5beea5f8f7f70aa0c0bb40e22afffcbb5917fbdd. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZHZ42086592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafc3150806fc2c29bcff3d9c53cf37a354c8164f8b39063dc58a93a91221594. 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/QZMZ92054035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0cf36c117ced5d2478014809f74a1939adcdd56bf626a937259e63a267ea69. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZMZ92054038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fc7c4a5bca31541a19a306aa972cf59492d914f54a8197afe8a0c2f444688b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZMZ92092399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552cb5fcc03d72db2eb7cb5722d9d1e83dc4bb040acfc7b47cd6fdc0022d4c75. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/BXWZX2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339b7cba1a4909d393c33c1ed8dfa7869b44a48272209d2741d7f7ac6020fbfc. 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/BXWZX2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfa330d7c6e14b6348b5f0b8481abe9e6057526897b100e27a3f5896b814ff7. 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/BX4E52001150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3510fe1c8989001a1e50d80b278cda7c6713eb9d3c62f34f8ff352ede3c37305. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/BX4E52001151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05884c72a70840ba25038b742280dcda709ce83af30fe762e25d8a262a6c5736. 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/BX4E52001153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7554e7424c5e67574ae02a934ed536f84a97adeb55a7a372924b42936322d76a. 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/BX4E52001154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36c7f07785d8a8de508e52a9f7aa2ab6fcac11f03f555114356f96ffe9090be. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/BX4E52001155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9627aaf0967ec5641a2eaf5ecc104a35b7f9c453ac7a86ed0a583be071325060. 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/BX4E52001156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a46185ec289e31db54e690c3c916289df46bf6a10b98cf91b076a702e02e82f. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/BX4E52001157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b5b49fc61e03bff2ca0cd81daa7da62853b928214e0832a5a9a5a9797248b7. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/BX4E52001158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5ffd29291e2a7b9a4e42170e06300046dc39820d3cc2f2d3373410e99f8a92. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/BX4E52001159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3862395a0705068b5ea8f79b4ce570e737f4e0ce684890d762cec7d68d8ba6cb. 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/BX4E52001160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269118317c4440419e3aad989e7241bfcf53a3b4a910367a0bd74285155e6dbf. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/BX4E52001161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ab31559b83060a7f5a6394383df620bb644bfa0bebbeb4321331950d9b4ef2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BX4E52001162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9936dc62779a7e9a2aff6300fd0a83842c57fed7a3ae9518e54f52c0bc9b882. 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/BX4E52001163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c5fa50e36e225d18b114134a756f35b9c0f3b03e1d32fac9745f6c1b7b2139. 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/BXWZX2100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7241f5bb008d1d9187a49b41c1d5a744ad2d07e70b7bef1758286d0be4eda6da. 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/BXWZX2100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af5fb4272958891e500ae446b3188ce18e10bead381bc089d1b85f1a2ad867b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BXWZX2100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fa73c7fee57223dba6dcd32a68a1b89d87529ab738fce662db3a0a967bf6ec. 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/QZW9K2350588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42b8dab7f365f96d7cbf6c40a62f1174419de6ccc4adcf2b325658ba26d19e7. 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/QZNJV2565205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a85cc6d0b7efbfccb86003060b67f356225d9d5bcb87752c4ccb3cd04b6870. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTVM2528292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d70883e8b836827ef352da12f149eb2ca6a28db740b9cd61551635eebe7eca5. 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/BR56N1800031.