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 0x66e66c17e84472422d51cf215925d54682c09a5c0429247e83273475102c37b8. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8e9e06b-5cf2-4162-982f-dede78c80308.json and https://artists.proofprofile.net/proofs/artist/e8e9e06b-5cf2-4162-982f-dede78c80308.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 0xd24275bbecb54d5cf23ac0f1d3aaca97ccfb21fdf918d8abc1a1d5541bedd1d2. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/AEA0D1802648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2c547dd448e97a898510b798545dbb4ac009e57c2a0f82206a33288c52e5a0. 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/AEA0D1802649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa7dbe91c1c831cb604fc8b1702fbe0b31d7a21027b13cc013e67c28a2c5cb4. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/AEA0D1802650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30722dd2fc4e99e18bd33ea422a78ad13d1c4b650a0d08bc0bad104958597df. 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/AEA0D1802651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc975a988e21c9287e2d50f708a46407f0f11dda3f760521244bf78527151b4a6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/AEA0D1802652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fc0ca39313884df546045e1aa7f595f3d07daffcbc67e8c671d4a279ac3a90. 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/AEA0D1802653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d965e0b5ecd00ae84fb6fca78a73f3046f075806cfd89bae9420067bd4484f. 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/AEA0D1802654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32e8992d1944c27c34777cab10bcd44d4aa1aa1b8d3c00474b6261f4f4d94df. 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/AEA0D1802655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bc55454fab267fe091676ce1366b9dc4b8bf19ef524ef788a2c958c6935f1a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/AEA0D1802656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0628a16b6c41fc4f60d529cbe3191618b04e3bcc3a3df91f9f0b60287abb1abb. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/AEA0D1802657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1838b6fac242a0f65e35648f6aad5726f8a6ea17d3f9efd15a800c7f43091be. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/AEA0D1802658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0427a690faf57e92e8d479da7f6e5428eeb668df64bc13fff5873de2f94d212f. 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/AEA0D1802659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0d7bf28ab70a12ae9632a7d21cc4eedd11801a1f0dd2524391ac2b55746107. 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/AEA0D1802660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d17173a5bb86ca2489d68f63ee5e1d8b2155b6e7a4977354d5ae7252c999b24. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES71G2042704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c12c2d7d43b0bdae7703b7d11b141ba9382eeaf7d23999117e86d6fa6e64fe2. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/ES71G2042705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717e728acb81ce8e04f644a3e0460c84a86949e4671b398907e3d23994be2364. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES71G2042702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0a40a92e9bea1a9bb259f438be75151e1de7394cb2fd54e120ed43adf2a554. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZES62416082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15060da76c166034cf2985ae38a1813d5c0f3c32e276f1096c022cc8d5f86478. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZES92430932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80991a8e31cf9546a02dab3de4037e065f898ad15874d972cc3bddb852e37c08. 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/QZES92430933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e386d5dd3ff637384745500201d08ae604e9e3c5e9c8933371b09529ec1397. 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/QZES92430934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550dade02d985b35540b84c427d9d328d0bfc61c7c8da8f8076a8f7e0e210c0e. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZES92430935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04a5881982bbb74849d4f6c1c06bf5a17ccb983cd02beb8d05e51ef76e87ca1. 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/QZES92430936.