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 0xce797a85852d698029a81137e4a4bb98234aba82a8b3251dc83b4191593ccf51. 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/3d729db0-d8e3-462b-8ea4-4bab7918be3c.json and https://artists.proofprofile.net/proofs/artist/3d729db0-d8e3-462b-8ea4-4bab7918be3c.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 0xc3c5c41b9c77337f944fa4944a245254cb6102ab7b8c8e0442494d21025e5b4f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/US2AR1441103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d67680175fc6080dc9af871f060d1c18d1e6156bf371bc5372a26a298d78c7. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/US2AR1441108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4485620849cfd76e4437d6c7284fdc182702e069d70881805261cd7000dc304c. 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/US2AR1441109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c5c41b9c77337f944fa4944a245254cb6102ab7b8c8e0442494d21025e5b4f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/US2AR1441103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d67680175fc6080dc9af871f060d1c18d1e6156bf371bc5372a26a298d78c7. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/US2AR1441108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4485620849cfd76e4437d6c7284fdc182702e069d70881805261cd7000dc304c. 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/US2AR1441109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385c6f642100116403a4da114f163022b1c499f71ea2a0572c98a2794d9e3703. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/US2AR1441102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccde9a4eb2d2bdc5f3e676460652a85644a55aaab3995db2d11ad7f3e85949b. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/US2AR1441104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0bac0bf27a040e5a403ecd757a8bf8cccf586b7901bde1d3e442e7047f1a34. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US2AR1441106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82783a0f586a99a793d46d6161787024d55393debea5d61f6c0db764ce88ef5. 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/US2AR1771403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe210113b18c7757c046a37c9a0963bf74519776cfc6ca8b84d893653e588008e. 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/US2AR1771404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09b2af53c078a29b22fcfcfdb88bbe979c644e0af4944d58ee728d6a751f51b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US2AR1771405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0154ec7a9939b2d56f4fe08799b6dbe5f3787724d5ed5e64df56aea5f1444d. 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/US2AR1771407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c5ad41d77eadb5fc808ccdc1cfb3c2d3e1be9dd5753c8877949c3802529b20. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US2AR1771409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7988ee2b27d078df5616549fd48971169d80aef990681a6460c966df9c9469d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US2AR1771410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6242b58b6d69a3156144a4e19ce8d6c6b298f11f040dd72793ec6158dc5d5672. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/US2AR1771411.
Samson And Delilah (feat. The Fairfield Four)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07e5f28e88516b29df246416fc8a12c1af75aa9d0bcd801fd85dc6a0e22513f. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/US2AR1771401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82783a0f586a99a793d46d6161787024d55393debea5d61f6c0db764ce88ef5. 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/US2AR1771403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe210113b18c7757c046a37c9a0963bf74519776cfc6ca8b84d893653e588008e. 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/US2AR1771404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09b2af53c078a29b22fcfcfdb88bbe979c644e0af4944d58ee728d6a751f51b. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/US2AR1771405.
On The Road Again (feat. The Fairfield Four)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2054e248f6e51f899027d047c9751b5cd92e5ecce263e826415fd263fa12bbf. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/US2AR1771406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0154ec7a9939b2d56f4fe08799b6dbe5f3787724d5ed5e64df56aea5f1444d. 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/US2AR1771407.
Always Lift Him Up And Never Knock Him Down
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddcec1cf9d599503f89b307fa88663519b5ebb044624bca1964b4d9168a80dc. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/US2AR1771408.
Take This Hammer (feat. The Fairfield Four)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6242b58b6d69a3156144a4e19ce8d6c6b298f11f040dd72793ec6158dc5d5672. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/US2AR1771411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82783a0f586a99a793d46d6161787024d55393debea5d61f6c0db764ce88ef5. 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/US2AR1771403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe210113b18c7757c046a37c9a0963bf74519776cfc6ca8b84d893653e588008e. 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/US2AR1771404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0154ec7a9939b2d56f4fe08799b6dbe5f3787724d5ed5e64df56aea5f1444d. 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/US2AR1771407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c5ad41d77eadb5fc808ccdc1cfb3c2d3e1be9dd5753c8877949c3802529b20. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/US2AR1771409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7988ee2b27d078df5616549fd48971169d80aef990681a6460c966df9c9469d. 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/US2AR1771410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6242b58b6d69a3156144a4e19ce8d6c6b298f11f040dd72793ec6158dc5d5672. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US2AR1771411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ce750f08703c3cad4a8fd5e3000a7bee305ee71ed1a95440f590f88800f69c. 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/US2AR2007080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046f5086ec1e7b6daeaa06603e177691775a3b0847aa8e706795ab134e3dce76. 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/USG9K2400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35399f9ae394bc6e207e4f0c56e520087220460e660faed9b7964d80ced7d01. 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/USG9K2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a47ffcb5e9a745fc37703bb2edd0058dc3af009c85cd33d92cc2ac1f45098d0. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USG9K2400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e372a7d73c54a2ab60bac144a5e349f1cf68de466b71771d368c4a63dddec01. 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/USG9K2400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fac42dadb7877aa6e5b65d5c14b6056dd4a230a47ec379f932310e2f17dbe6. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USG9K2400109.