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 0xa2e212820a041bdbbec055afc05c08548b1ead56c6992622ff31f25d77f1f702. 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/339e4a86-b3b4-4a90-ab05-d8cb5f254285.json and https://artists.proofprofile.net/proofs/artist/339e4a86-b3b4-4a90-ab05-d8cb5f254285.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 0x561fab92506e777696cefab727670bf4c8470ebe0a709714a7613b3dbe1d1187. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ZZOPM2118758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5ef552afdab144475857b8b102fc10241448c2011b79166d060893a47956c3. 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/QM6MZ2302640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecc1fac1a18b0c120c62b59b5341b784351eebd9b915b0acc399715428a5388. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QMBZ92398096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd07e4403b206de53bb4e80e93bd3bf4aca96a66d23baa848e98aaf759f9fbe. 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/QMBZ92307821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5ef552afdab144475857b8b102fc10241448c2011b79166d060893a47956c3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM6MZ2302640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0663715c5945809b233127cca64a2db275a4a063e483b9e24ad4e84aed402f. 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/NL8RL2426592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8fad27fdac6474039b07e2fe7586762f5804b381d3299695376278ad2d50f3. 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/NL8RL2433420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8fad27fdac6474039b07e2fe7586762f5804b381d3299695376278ad2d50f3. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/NL8RL2433420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0663715c5945809b233127cca64a2db275a4a063e483b9e24ad4e84aed402f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/NL8RL2426592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488ca5dc91e59f9b9dd23b74aed79e9f8c48dc4f7db83cd667c6862335922ff1. 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/NL8RL2543527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050b59e3a03bdbf028301c2e77a2a19b14b6b14a0d832f28b61affd0b626ebef. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/NL8RL2554352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826572a378fb9173959b30a2381f1402d2bda9511b9c022c02d49f960c756f5f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKPL1959567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb465f61921a72de9b235d55dd6a8f21b0aefd40e4cc9c1634673647400bd040. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA6D21900226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d3a85405a4e7d22889d24f6bed868c34810eb34a370d94e8f300ae6469b701. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBEWA2100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe173a1504206ee67816e2bd4af78e6d9eab7afc5e676392c00d8f9658affe1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZS652238202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cccfc5a01832b08a08ed1efd2ccdd31f1655f31d7302294b5a579a34788f34. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMHL2235016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c521c600c223a5f9f73ad9ebc59e489566235c19322ccee0242aff60f45f15b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKPL2166114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8067a7718d7ce13601f9a84e1bb802670bbb1f22ab88362c7f77a0670b707ddc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBEWA2104693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81211ff574188068d80bbe2e9b6cb71f49999ae71643eb531d8112d8a9fae728. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKPL2202589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735c94ed55cdeba8e750d79b1d3520274f66ad59682f458013971a74160f7136. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKPL2086541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d3a85405a4e7d22889d24f6bed868c34810eb34a370d94e8f300ae6469b701. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBEWA2100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb465f61921a72de9b235d55dd6a8f21b0aefd40e4cc9c1634673647400bd040. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA6D21900226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934d8b8393fa2411a23f45a4b563a8ea0ea9bec5e8ffa0d841a317f0679db527. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBEWA2104696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d3a85405a4e7d22889d24f6bed868c34810eb34a370d94e8f300ae6469b701. 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/GBEWA2100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d3a85405a4e7d22889d24f6bed868c34810eb34a370d94e8f300ae6469b701. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBEWA2100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8067a7718d7ce13601f9a84e1bb802670bbb1f22ab88362c7f77a0670b707ddc. 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/GBEWA2104693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f43e4957488badaab507a55d46aaa83c4fd7c5c34b700ea0c9d3faa94374763. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2028676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a4c8175c4cab3477916efda526f8d702e26df7dfae0ecf72402f1a861ecd0d. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/CA5KR2228109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a4c8175c4cab3477916efda526f8d702e26df7dfae0ecf72402f1a861ecd0d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2228109.