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 0xae99614a7a174e9624de98b85dc7ed570ddc29c0b29077fc56962a7b8949fc88. 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/8a06eccf-82cb-421a-8071-4017d8770f7e.json and https://artists.proofprofile.net/proofs/artist/8a06eccf-82cb-421a-8071-4017d8770f7e.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 0x117648cc1cedbca002c2a6defc6e731d5e0a02fb548ac8880e54cf2ad0d4f434. 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/EGA252003970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09193d4dcd0ae775fb1d5ce75e7731ac03b65b92110fe306f22d382a238d2368. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/EGA252100436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09193d4dcd0ae775fb1d5ce75e7731ac03b65b92110fe306f22d382a238d2368. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/EGA252100436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bdba355bcfe3bc204b7a94705e1e01ea7f43b67ce1c0e1ee2060b8a6cc4824. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/EGA252101021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8434d3eb45b4f7aff2be92e91b5e318d94abe9f3360188b5cbfd8b536845905. 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/EGA252104040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8434d3eb45b4f7aff2be92e91b5e318d94abe9f3360188b5cbfd8b536845905. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/EGA252104040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa7a8417a95470db8a89f59511fa5edae9dc2385efd268ebaca9bae7e7bebfe. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/EGA252201246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a11c9151dccf09d34fc6435b91414225de0b0e6c99a05e4a21c9e785e31bec. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/EGA1K2200413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13f1d8c49f7668b7260c90016feacc6903180a33f46535cae520af42d2704f0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/EGA252306550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489d7f54bf78a1a93a4708d94eec2506d595494b621177977b0677376ee4de6c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/EGA252305938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd9748348a481b058bcafa4e9ddfbc59ce8612b17f3d5b74506060d14ba6506. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/EGA252312432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0ad57a39ec1cc5fb9b74563f5e91961cca2d8d5c54bb35938343cfdc573114. 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/EGA1K2402849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bf4813caff386b27fb40f1c039f4046d6f118d7091bacf2bdae4872898ddab. 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/EGA1K2402850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73ca82e176cf6f9c56a8daf75cb2b7eba2b886eb71255ad6c189faf8e639e1d. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/EGA1K2402851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21a21c8c34d18386310067fa1f4fd6a83d37666d43d1a75cd0a977d0f5bed90. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/EGWKS2424511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fab77c52bf5822c9b4089e6166ed5335f0231fb30b1397e16b5837dc297bed. 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/EGWKS2445768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a3bc5c27670a5b06c63a808f4dfebbb8d7f561a5201ee9aaaef566164ededb. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/EGWKS2476338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2efc6c647a94bab557fd6c59ee11434c3cf05732f2acc4fda891e1b1705b7be. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/EGWKS2530623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf886b71d2e84ef45f73b07b4133ffa9fccec636ea008db3d7c8fca399b4fb26a. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/EGWKS2553642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b1ccc3b90ae5f74ec1db72e888e3a27b57faf657de2e80994e5384508cf4a1. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/EGWKS2529120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f73dee40e8ba82bf3d0cab0c8ecf8da553b5f9492d705c622c2620337ec821b. 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/EGWKS2595075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24039d837fb44a0852cba75251decb629310c98744d141a7a7fdbc7a22781ef8. 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/EGWKS2593716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fdd28b25e06690d057879fee5c557c51eddda806ae0551757e0d9aca39fb1f. 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/EGWKS2520928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5507da92beb05e64e6a03ebbb9b8cc90b7c871663794a612c4679b9b40c9a4d1. 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/EGWKS2533697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f5c2c148dd2fd0883dd5a089dc847d0d78157c2f16ab8b8ea5c868f5e28993. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AE2DY2500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9761071d3e813369838fcc1214442c1880a1588652ff95f4a73bb463f9721f6f. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/EGWKS2544568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c12590bfb1421e86ad16543f2ce628a9cfc098bb97b87d3b78f4f544654108. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/EGWKS2584504.