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 0x4002f27bbd4a46b9db01703fe54278c01eb7328ff9ef728f066a9d9065183c87. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/551404c1-6b42-4509-832c-9a07c3200ac7.json and https://artists.proofprofile.net/proofs/artist/551404c1-6b42-4509-832c-9a07c3200ac7.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 0x23eb608ca302fb3f33f6d5be8932146a3ed07e8d03b9246121d8288c091b1dd2. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZGLS2529320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3828d9e76721903adf0e146cedc8b8b9b7c9a7bd61109c0a21c261e762bd31d5. 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/US7VG2596220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742018343b3f8529343f8fcba725415c41b1af52d9d74731937861d42739ddd6. 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/QZW9M2412060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdf60fe485059e54834678ce9323c767c7fe749a32d7824d57209fe27cf0edb. 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/QZW9K2415525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb858d550162b6fa9e0852bef9e28b7e6a9d14ea80f7c311430e8f050d3201cb5. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZW9K2415526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7a2f2038310dc1210f9086c6b26b9b69dee8104ab5771769c7caa92a23a00b. 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/QZW9K2415527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09b0aea05e025a98bfcf4d67c3f356ce8a73a7a9c567926c0b5d025116ccc9c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GX53U2390041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108dd3c477e7898f2053ce5aa0e4ebd419b40cab3ebd95679a0428d1cceeac8d. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZTVM2467170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b6e50a4b8794d340fa9264e37e4114729d38bea18d6a42c1fc644f8ee34853. 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/QZTVM2467202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0777e7c4de71ebc765ca3e8176ed4166195d0f333ac270b14889c742a0b5f132. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QZNJZ2429919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84577755c2a9f8dd8550543435f515fc599207f71e803b645521f737892854c. 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/QZZEB2417578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4658c1f7b56036b21dbbec8eae84c4b1f0315327d3db6ac50e4a3dcc5756d795. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZZEB2417589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1297ed2e6811df96e7e323b7805d6a618edfe4e0363a941b522491f879143d49. 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/QZZEB2417592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ee2c7077c47f3af229694a60a7894de0ed0f9b43972e77e85ed2d6698bfc79. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZEB2417610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd69909e53acb9f368a0ff76a3698a57a15a1b2fd42663964c057aad051b4fb8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZZEB2417634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66288d7d8d2a05ca76ee7f84805abb8abaf114d14b7f354f719bc5f56ae74178. 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/QZZEB2417659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ef84344ad60895046907cd24acb8a04be470656078230b90ff215b2b93005b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZEB2417669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2597dccf951e4bea4a5b89ad17b2ebafd78126d55bb4cd14f16ef3c2ff1e5b5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZW9L2285156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2db0719977cbcecce23d2efbbc45cf7ccd2e4107e5b47be7c3e5ce0fb684717. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZW9L2285157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfa528d0f4cadc509579cdbdbffdac618dcc1e1cd972168fb2c9e1085936fa5. 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/QZW9L2285158.