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 0xd5733478d1e80bbcf865af5f368f28eaaced6b2533c306c0d345f24b4282d907. 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/bd2086a4-b78a-43e8-bb45-18df037f044d.json and https://artists.proofprofile.net/proofs/artist/bd2086a4-b78a-43e8-bb45-18df037f044d.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 0xb2cae6ebf80f33f4c33a1a0a5a68d2436235bdf8b15fbc9fcd11a992231cf227. 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/QZES62088379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1905cf29372442209738f1bdc4a0db91d78d0e48dad6eb2db818358202bad984. 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/QZES62088381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8090eb27cc2c1987678a213a6a55e960b1dcbdcd9d7e61b38071ef9ad4c54cc. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZHN32066088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecfa2adddc39f9b30e09a3d64445c16f4a16c1fe3c66809c3e61af4a9119f5a. 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/QZHN32066099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a53e5d7a59b36aeac150c55fbc2865b53b8208f3fcf0256117cce147cff1738. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZHN32066107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58676af63347c77baf785c7bf5f699b2e94ccd12d61d63b7f2f1a5a4000eac4. 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/QZNWW2109429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb902006ef0a963b5467b00db3cc4f92dab855c794089883dfef3a80ddc003769. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZNWW2109430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89ff61b9e16198309a3f4a7817e9adbeed76f1d3c003b1c544fa49d6d8c66a0. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZTAZ2237136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6643fbc81f6087fad14713e947c3d4331f89c844fba7cb8077ca8a5dc96cf2. 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/QZTAZ2237139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec438f7ce0b3d1540d2c037f0dcb6375643c92c956507d5717b202a55b10ce1b. 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/QZTAZ2237140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab019613b55fa52d5437c3c51a249cd1f92d9470b410dac44b252858c5fc1d4. 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/QZTB22222822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4337e0f2bc30162511dbf6a03a20bd42df987321bbb5e3ed2b79203a3f838c2c. 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/QZTB22222824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b78673fc531a2d5d737dcaf0ce4e69e4d8ded12bd9fe0d6b71570673c7a70f. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/QZTB22222825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa763c0acb56fc35be8339032b796fad27e3b8f568e86f078c1b651e05ac6e999. 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/QZHN52361905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa841632be75652b20953d27acef2ceec19fbb814961e7ce2f39d1dfe2a1016a0. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZHN52361906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338eb85747408fa399c427e5ac5a02794adfc04ddfcff22f44d80e25081beb9a. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZHN52361907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e7a4d722a8d6d7103622c8860b61b83f01892036412731b7246489613828c2. 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/QZHN52361908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ed6956c5b5a10b25340ea8dca2b012963f07360090f6c3e16af3cf5b984b39. 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/QZHN52361909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161b93f4db0f448d4227ca3c97289920dc8c3cb0b19bb339057b7fc2412798e8. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZHN52361910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdfda09bb0f13675f41172113e6ac0a551c2e3aafd864a31da472a2287631da. 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/QZHN52361911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a3d292c3ba459d9a15ee11cbe1f1b497aefa8ebaf7c0c38a1b3e4c18f8a51f. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/QZK6F2396567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5337e48a1d1a2c6fe39a10a5b9377680071cc90b6198494b4fd59fbdf7d80a53. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/QZK6F2396568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5638e811c6fc5c2f5be92522b3c72615d995ed10488dfab170eac0c4a6cc45. 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/QZPLR2399450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0d4e44f9041dd9a6bec698e7d84e941317c992f3a95cc9e9d42189880c1970. 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/QZWFJ2337596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21e481bcd3e8bfadd24f2c46d3a80e26532d42b508e3e9a90dd56e867cadf43. 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/QZWFJ2386796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2bf07cc623cb856b3dc8b4a839de2b18b5f37db6e1f21c99e03e6c88f174b5. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZWFJ2386797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419c202545fd5a25207c3ff063434f3f26699f2e68139c238b3c5f1d7f45bff6. 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/QZWFJ2386798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8522f8965fb617a546314297cd99582717e41f29a269c44c28bf970191d26a22. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/QZWFJ2386799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b11c0e53d286325776780ff2f2cb76e573464d05a8a5394d26e2f761371d27b. 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/QZWFJ2386801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd985aedec1455a3ccc77b5e75e19b880f0734386b6cf8029f8c8b54905e0c678. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWFJ2386802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7acd4c81a12c6aaeb92e3fc78ec9df3f5aa11f67ec5494934b5c3e8e9e2938f. 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/QZWFJ2386803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae8e3cf7e97d315ed11d0eb2ed16424361c7fa5f0fb02c5e554f0dc6da64226. 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/QZWFJ2386805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8a7d97588d70ed6dd9564ff8c81899ded08af0f4989e87e556c39a1a109b1a. 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/QZWFJ2386806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23150afdeddabea6feea527d178fc537be2d6c6a2b0cc527b120f44eb7c39e3. 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/QZK6L2496554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67db8dd942db8a2c95fa5e505d6fc7ba95836b8ffb5387a07fb783d16b2738f6. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/QZK6L2496555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f9b2615f5cb5ea21be978aab0ce93b655d80b1f849593e33b9cf685ae0beff. 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/GX8KD2311558.