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 0xe30f7b8244c85da4125b477c3c84407b7f1027f25a028e76476ba7cfa6f58846. 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/55129ee1-6698-43c1-99eb-80744273e1df.json and https://artists.proofprofile.net/proofs/artist/55129ee1-6698-43c1-99eb-80744273e1df.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 0x06f5b6052519669a2c74210b86f4e8a3dd2c744ac5ffe981f44bcfb3d07ece1a. 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/TR0391400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab106eb2e12595bc9ded872735b4099607f5fdf2b820d2c5d30ca3f38832e3c2. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/TR7911500238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f763fe99146e72a3a78c4c0502ba5eeab0987d40c105dd88c91dbc2b9e0ada0. 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/TR7911600294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9a05101c6ef3ddee76325495e66cef7ac3fbab2ee87d901a155839ed6851c0. 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/TR7911600298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031aa98cc9ed5e20680a5c02c6ae7303790a617e6fd10ac59121993194fa2bc4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TR7911600299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b44c88f69e869d5a879b4bede07d12e7a699500534df880594bfe65b64ac7df. 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/TR7911600300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1c39bc3d71a9c5324519bdfafaf1355c35089ac127cce3bcb69bd150605460. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TR7911600302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dea3f4103b817bda428f6af2591c8fb19671b3ccd66ea4e01fed90c8914b12. 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/TR0391700047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe937d877d08c19b71a62f4e3dbe3bef002c83bc73aa9203fb354a2080a7441. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TR0391700041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccc636218464eeda4dd8ce5efe6f976fbdea08a4d61aeb45f8c61c0eb77e983. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TR0391700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dea3f4103b817bda428f6af2591c8fb19671b3ccd66ea4e01fed90c8914b12. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/TR0391700047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe937d877d08c19b71a62f4e3dbe3bef002c83bc73aa9203fb354a2080a7441. 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/TR0391700041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3535b152b028f112a381c80054615823ef1abcf5587ad71f2d48c2761ad35de. 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/TR7341900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943f28f7a499ba0607b5c0d780fecc95dd082f22d1726ff23f83bcd28af0c385. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TR0012100249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbc803191236532b8dc9f7811bbfced6b2ea0302833e13df83f188f40d98c45. 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/QZW9L2355042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba31a2b76021fb8c967d4790566f962337d399f7c1ee90764826d41f0e047872. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZW9L2478456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e067a0a6d83f56b0223160a6ab81527994ff61dd91e25ebca178fac8385759. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TR1660600395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd712c4b9ad2019e7c924deb737b12a47c70ed3af13d479d4a86ccc90d365cc9f. 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/TR0392400866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e200aaaaf42a98a5505769cece48190b77adf28ba391c38536ea6acb0793c15. 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/TR0392400682.