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 0x9bd4f3d85e5f22965029d1cd4534d4c8122500125132a68fd7488dcfd30d6faa. 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/98a0a179-f62d-427e-a0ee-a1677a8e0f55.json and https://artists.proofprofile.net/proofs/artist/98a0a179-f62d-427e-a0ee-a1677a8e0f55.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 0xe0d5ff37334999209fa825b0683ebbc7250ce7f2f340483e6683953be5757daa. 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/VED049900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b14eda5751d7dfcf3ab372fc1a2caa9c8c7144e507b65465996cdd94f6e8118. 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/VED040000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4df42e5da5d8a07df6c0cc25f4c1df65ad4616ac6b0520c69a9c871f0d9df1. 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/VED040000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7098053c9d61b8c9bc9a74ebca7b049fd5feb5b15ff557bd0c22febd41d8001e. 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/VED040000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a9fc8e697a1c6d5750a3fc1531b38b19d37a1b2b8539b01faacb517fbd776d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/VED049900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93855b064d56859bcaea470bd568dc0f5f84221794a230f169f63bd3cbb548d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/VED049900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3708f8e8b1c7b631665ad39dc4b55c8497113c4b5679967f4a39e6da1de122de. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/VED049900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d5ff37334999209fa825b0683ebbc7250ce7f2f340483e6683953be5757daa. 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/VED049900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11594548f85983cce44a2028dbb014202e43bd7e76da859b9155531c86badf02. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/VED049900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9367f32050704404c8add22231af548f366831eece2a177523ead40e2ceed3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/VED049900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a3a668dce9266bc2902fbc48053828c3033a94aa6451cf8425a6cc6c85d140. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/VED049800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda57f8ce436f08ec9d78b793aea9dc65ce01b94f02927655a8f7286604b1d4ed. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/VED049800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84149a925a6828ed204729917d35a6ae916a816825e651a035bc0975132f3ff. 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/VED049800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7b45fcafef156f11e2df7bfce9ef0e33c0ac3c7de7ecd98019fbdd04431829. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/VED049800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98be5c94b0bc407713e28dc1bdc14e99a17015a292d94e25330e98a67e7f77d. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/VED049800112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437d4df8aebca50691abb08e46320a316309de39fd3d1f79b3fab717bbb8d5e2. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/VED049800116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b14eda5751d7dfcf3ab372fc1a2caa9c8c7144e507b65465996cdd94f6e8118. 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/VED040000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1c5f12b31a2e2f419d263aa3f5353e2dee38c8cb61c8fca4beed88e915d0be. 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/VED040000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4df42e5da5d8a07df6c0cc25f4c1df65ad4616ac6b0520c69a9c871f0d9df1. 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/VED040000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2da83cec6bfeaee63b3eb0ebc88eaa1f990b75dc1b50c804b6d7b47655ea771. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/VED040000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91522e9c192522ffff8ae851a4b6bb3d5b9b4f643b1307e1ca89e7b6f112485. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/VED040000075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7098053c9d61b8c9bc9a74ebca7b049fd5feb5b15ff557bd0c22febd41d8001e. 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/VED040000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f9e8afad5d424f6fd8970faf59c44683ef92f001d067b02f3dfeb37169aadf. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/VED040000078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6243dbd63fcd12046807bc913844b38a37bbed59830e99c0f93a35abd09a51. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/VED040000079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95706d6a5a0a6a36882b1169d3c33df43e3ce1b1388f9e0babfd7eb7a5b1093. 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/VED040000080.