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 0xb04af5c2b2166149f21d61ab70f7823a8b6e606ac7cfe8f21727bf308275242f. 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/63421f87-c0ca-4001-836d-e862c6c6f3f1.json and https://artists.proofprofile.net/proofs/artist/63421f87-c0ca-4001-836d-e862c6c6f3f1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Popular Theory (Original Motion Picture Soundtrack)
Half Brothers (Original Motion Picture Soundtrack)
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 0xede5e1fae5020b467510935f0294da4f5495c0f6de602bd424df3a43cdd06210. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USQ4E2006304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0227cd580b0e3e5a279b6262ecbc251f0ed82083e3b7e11f7c1e0c687669a658. 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/USQ4E2006305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984aed0c496ccfaffbd6f68d568b54d3b265532858e58da46e3c884ff5b884a6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USQ4E2006306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef4f0d564bbae158140f07bdfbfcf0308e15738969b2126d0986b302aac2e32. 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/USQ4E2006307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7ff3fa2535003ce2d5bcc0d9a7f228cf1421481006c3aaf7ea98658a147ecc. 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/USQ4E2006308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb3fd5326ef5327a03acc69e478ef04ea00603923a6c6afb2ea718dd110788c. 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/USQ4E2006309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2078baf417dc281ce3392331d7e682c62247ca11a8a40a597026147d9501f6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USQ4E2006310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34aba1e73d0c43b6a8b955665b11a1bcf41dce97fa6f21ecd71f9278b177998d. 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/USQ4E2006311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8aa3fd2efc5f43e6fd10c8440dccfaf9f2bd6916b5e27fd85a153ea9c6ad314. 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/USQ4E2006312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96560bf4e1aa839d139735832304cae936ef63ce013e9a13fc6b66351f439dba. 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/USQ4E2006313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c437f665d4b6ba330ef67f844f4bb8ace0d2a98f85a382c9f45f0400fc1a70. 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/USQ4E2006314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb27c7bd002d5cbe9936a93f6c51c937a44dbe51196a83716d1f9fe8c769ba4d. 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/USQ4E2006315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa311ca3097a850e3d61916d214ce56e43ac97c88703ebfb6c4c2e563c90366e0. 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/USQ4E2006316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f8cd67c596e8d459836caad86a9913124938e36ceb86561d77322a3211ce7c. 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/USQ4E2006317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ca8203d57b31b4391f8e30b1d72a988df330a46e8752d2a644697659a72d3b. 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/USQ4E2006318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed94bda8dd438f8ee7e25bfc2c313a4370cdbbf12e785ee8c1e7abaea6218824. 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/USQ4E2006319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aab85a771dac9ed1e01674852e155683ae6740b69c04dd924b7cb055b1ee43b. 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/USQ4E2006320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea55541c387b342e6cdfe81cc86c12d6c4f0f734a3b252d252e55ba1e4b1a14. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USQ4E2006321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5088ccc51359dea2fff4a2465958100e101935356de69b130ac44b727b1cf070. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USQ4E2006322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467517c6e51afb0a94eba5c7a651cc30245908096a6ae8def0e677dc3ae552e0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USQ4E2006323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf30db0ac77a4706392cdce94ec2f57a8f0b0cea276d2ef217432899af2c5d3. 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/USQ4E2006324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acd4e1a35951703282ba08b8659ceb874c52396161ad68655d6f1f9e66d4fc1. 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/US3DF2233304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80eb10d046e5271b6adf31427e315cfd76d0fb4b1daa98700bb4c7218614b3f6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2233306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd74a7f75ede944387a597c57b2ade1d3b39a980bb491a20749adbb5956ef37. 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/US3DF2233307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009759219b2e0e5ae56c2b77ab5f5131efb7b745325b979032331c0d54ba028f. 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/US3DF2233308.