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 0xad5e007c587c11be471eb5ce0a73952e4ff1444948e23e1fbdd0a648c7085661. 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/a84efe78-8bbe-4ed6-834f-ec37c1ebfffb.json and https://artists.proofprofile.net/proofs/artist/a84efe78-8bbe-4ed6-834f-ec37c1ebfffb.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 0x2d6d30230de2ba2d437da9628d7be26f432e4934e2a91144de6c7e7088e95e9e. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USDY41915082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccd13baca16912755cf58c7f02ceeed84040f939da7eb63b1c827eec2a7d988. 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/USHM91989908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458abed63632850b74f10ef6ad60a680db4b6726ab72a0ae184c6bb48649b46e. 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/USCGJ2052037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6730090de7ef197ce2976499573b3534c5ed08304683f6d951b0ccc9fd374e8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USHM22067835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4826f4c34762d0dbd5a2f78a421495c67a02abf3a16249018bfe3673412f258c. 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/USHM92073006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ad352415f4cd026abb5fee77bf848786aa7f4b538460c82e65da80b209fdce. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USHM92095647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d53cc57276e092bf321534dc44abd3907a198fe4e1cfdb5ea89ca1809de271. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USHM92095648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230b2163c566def216dfd97b39e7d9e5c0eb179959a0bc0f405131473c254243. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USHM92095651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6730090de7ef197ce2976499573b3534c5ed08304683f6d951b0ccc9fd374e8. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USHM22067835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cfbecac930c0ee538fc050e59ca6c09f85021ddca6cc27a596bf614b643f1b. 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/USHM92095653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4826f4c34762d0dbd5a2f78a421495c67a02abf3a16249018bfe3673412f258c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USHM92073006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6f1c45a09f03afcc4569d48692ec60970e94c46093bd640962f7311c6fe017. 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/USHM92095654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e2f2045e08828c45a067e309669586d6ed022daa45a10a910c23eb69112be8. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USHM92095655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd958b8e9b925b882f04b879dca95fcbe69323a85506b699670bbdfb46d3ddc35. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/USCGH2144269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093d7ea51df7f7f9e021bf475922bab670d7c576ff44965ed3a1f79706e669cb. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/USDY42139133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb447eab96e5722ee22672b1cd6206801be2ece51a0eb1c17c36c6cbe69854cb. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/USHM22102632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e48a6582f7b6c7a073eda9b0453611c1e7eec3864a88264c9345cfd134d1495. 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/USHM22182376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599c664b0fad735dfe3b212026c4ddbbec1bc0b774ec4d30a5ce5cbb953048ec. 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/USHM82192520.
Everyday Heroes (Thank You Essential Workers)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4a3b2db4f1568a4162a03c5c033c3f918037c4ef2083888efa122d15f9bd3f. 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/USL4Q2184224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3af6b37edbad6c6e1a953dbff2689187c6c30b93672f325d72e267e426159f. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/USL4R2123336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057b8518153adcc9c86f33ce4ddea3fd137c543aecc45c72efe864d59720f8dd. 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/USL4R2123337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd831d0340a47f506c38d01e64f8367641a365a817e15f93bb73ec3fcdc4849a4. 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/USL4R2123340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327b6fd77c2a7325d01102322d603f6c68d35d0db6eb81b3fe83736f8f408a9e. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USHM82246924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f4a50b12685d7931b52af4a12f55491371e8f6beefcda5ae546e1502c67937. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QZTB22411991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4f0ca5406259cc40cc0295a7a9567fc34137d827ba135373d9d8b9298b2d98. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZTBC2404398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f4a50b12685d7931b52af4a12f55491371e8f6beefcda5ae546e1502c67937. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZTB22411991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce73fe06c765fb160685a391ea8e952819d7f15f2efd7e53b93062e49e4c0d6. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QZMEQ2541258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816e68c9560bd6bc2bc595cc58e6337432994dc0e345ca16b692f9995b758b56. 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/QZMEQ2541265.