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 0xa02bd65af91c50860173cbd5719acd93ce98a14e64d9c87255efd5d30419e84f. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8df13010-74e9-4449-8483-7e5dcfbdee8c.json and https://artists.proofprofile.net/proofs/artist/8df13010-74e9-4449-8483-7e5dcfbdee8c.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 0x603b394e0ce8644995658d88cb8b30b28d47112e36b9d4db33f1522987a63ebc. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ING111028720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ce9f6c8578ae4d4738a60d80da4b30aab3233f9420c6818e8fa0b3f0ab90b0. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ING111028721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea6096b39f6b0d58ba55e61cfac4db2480b8709db90e90921514bf65d888dc0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ING111028722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9390568efed50e49c09215a0b6f1cb8e7bdbfc14540b4d2028c7cfe1d4be44. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/ING111028723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d18c03a29a3573cc48ad1ebd2fe2a4b94fdd3b77c884b6fa1f9f3fde15ed68. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ING111028724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f246304dc923fb13fb61ca16c2d6fda5c2cb9d0bcb0a95e2083ca4b781e9cec. 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/ING111028725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c197cace729e8b365f463af95b40a3cceb207e154a63aa05d5ce20042f4fd4f. 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/ING111028726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da3ae1bc412a16cc144ad32a6ee4c1c2b7e8edba8fe5951c7f8c1606900b5bf. 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/ING111028727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8123f7e7c80845c50474d3159a5fb596d63037af5841fbaeb87b5d4db20efe. 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/ING111028728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703aaec03daa717e4f37b91cea8714d3949b4fc0fc9d9bd5fb92178d87a5a7c2. 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/ING111028729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6056ae2ea7244cf49eede4956302c987f4695c5f88de08da5bbac781fb0f6e. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ING111028730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b889e0e4ff6b7e9e42b14943ea752b4316a77f63366ee0cfe5cdb55cdba704. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ING111028731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c087e507a2e2569f0b69ef5923ecfb2a0e7a23641528d534b62cc239b2663ee. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ING111028732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350658b332a4166ff0b4c38965432a0e11b13833874a37164d0b04197b3c2b74. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ING111028733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bd1486098041627e6e31c9022f6ccc8da54507d977d428a6561d9257f0b5fc. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ING111028734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc21fbc73bf6ab3d276ff21d05681a41f457ab7d753ba8e0d06042e868060e22. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/ING111028735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21548aea109bf1bf146566f0c43498fdf3ae6e24d9d83ad9b6e0cebdbd0d3a27. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ING111028736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199b23f0bdf6e91f47424cf3ea15fc43842cb2d61a9d49ba0f13a48a8937a1be. 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/ING111028737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250b634f1cd5fbae3338a627346dbc808fc78c9cffdd5857673158e533279fbe. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ING111028738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfa11d3abcf78b9bd013846724127a0ffd65bc3ffb5f726f84c1e7a8e17eaef. 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/ING111028741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712e094dcabccb9792951a2b3d686cbc4284cd0bd246187271cabff8ef196c4c. 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/ING111028745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9087f8d1f00818c44600fd6b9df1393b1472ee3573af68b53cf425ed92b60b53. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/ING111028752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fa7a2fc53d6a30b8e4a03cc1669dc44c4803006b41407f717251be3e03b30a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ING111028753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ec79c231e622aa7611baaeba5b7a2ec0360580b12ab752f5610838e94bf936. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ING111028755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cbf72c1e76174b4bf0a3b967d7062231e450c69c4db5586f893b9fac575d74. 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/ING111028758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6bdefaa189f7e251ac1b47706df279ab0302cb46f17b3528e94248f899828a. 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/ING111028759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcf1e97f1a178ba3a943ce207051143e167506b50ac39b6a13a2666fd5d4cb0. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/ING111028761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b38730f32f290ced2f92fd0230aae81123151194980692c751e4b166330c7fb. 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/ING111028762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb207157006087123003c02bfb1b9f1d6c92da9ebf3b410258d894bf907c0455. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ING111028766.
Reviving Tradition Rajendra Vaishampayan