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 0x5ae7843f03dc082a242b9dc7a6fa2a277d5ca13969da4803818b92990b710d9a. 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/54bb1f1a-426d-40fc-828c-15bcee3e3440.json and https://artists.proofprofile.net/proofs/artist/54bb1f1a-426d-40fc-828c-15bcee3e3440.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 0x841df2b09492e1941e3f742232fa94cf2c02583fe02866aeb3f25f34379a2ab1. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:09:14Z), 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/GBSMU6520025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9743329581ba09838d35b8fd3885e19ddbcc350d6daeb04d865f82547e3e0060. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/GBSMU9267571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc76b91af6929f5eec067c2b4cff9642ca582b0f5cf25f167d637724d9f4801b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZS662125455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e94d9155a87bb53581741fa5f856c4b1d2ae5601f324b28e7881d6b6d68921a. 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/QZJRB2211139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef03b2ff77fccd8fb07ac08d11a6023d06a41e364c9b5e967e87707440bfdf5a. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/GX8KD2236400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fede113fde5075dd2e84092e06a98410e7a0d8dca960cfef7fa8794aaf52f3. 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/GX8KD2297314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6b16415bdf00e6c5d55df9a10aff629318c4b7d562b8ab4c799e7f993beda3. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T06:29:56Z), 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/FRDKW2207950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6b16415bdf00e6c5d55df9a10aff629318c4b7d562b8ab4c799e7f993beda3. 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/FRDKW2207950.
Aserejé - (umbraid x Under the Moon edit) [Hard Dance]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f13cfd6a72af2b5e7e0e6108b8cb8b3b7f56994ef0a15def234767cd45f2a4. 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/GX5MY2343079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4daca89a0af03f9b04ffc547fa43dad5087aeefdefdfd75a2e34776ceed969. 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/QZFZ42427904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ff58e8a5365f2025f4c501dfa5ad7c8bc8d25dea4522a70f3fbc6486cc1d68. 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/QZHN72465685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2a4cd93545ca17e78c1964256a018d76fb81534d197534cdb45f0fa3bc6638. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZHN72465686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92a3bbe544724d001d64dd27a6a844e2f7f28b20b2420e062f5cc7aee5ae71b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZK6K2463728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d754dbeaa3e9754d955eb2e2a7fd122a817a5156a2b8a92e62d02e38c448bd. 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/QZTAS2412069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11333a152e6b235d86e424d92286456b5f120b141b198fe0755ce013c7d56f3. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/GX5MX2484806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bad6b722b3744fa31f548a43d89b42af93a0b05d48eb6064300e6cf70c3771. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:34:20Z), 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/GXF972454104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4619bbd33248de0b2b9c1b9b5987751315439f08c62bb4839383a6a3e3d70e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZTB32508067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c3f45495ecb585aeed6a7207d672555e0971cf131c9f4b3c425bc1aabde5e3. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTB32508068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fb23985e51ddb44c06ebad8098efc52af0e35f92798f1b4f2ca5e2e9224278. 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/QZHZD1930037.