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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb78e1adb43f8d6bfb4f7b4066bce0f52d311d82b1c78892978615ff73d19c7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96b8d035-6d71-4a61-8e7c-d346cc6fc1c8.json and https://artists.proofprofile.net/proofs/artist/96b8d035-6d71-4a61-8e7c-d346cc6fc1c8.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c22f9af7ebf28ff0b4e9ae0315eed9cb7ea82dc7893f505423877ccb34f2260. 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/TCADP1828463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940d037be23ac518be792b380c0c5c1fe306db08befbb065fea3f903e2daa80f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCADP1828471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b62c5622199772ed16c45727c46c0a660d5b305ea2a3c38549406ca315e049. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCADE1708015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07d29546a6cf16f076c8f0aa54565f92015617a4b59dd7f7b0ebfbe0efead4b. 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/TCACW1624995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d6e728b69d34ae0e11235b849d3bba16d0f153c1de1f89b191a4890257fcae. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/TCADP1828461.
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 0x897428bb95f771ef543cb71e49cf25bbd229ed90b4a6bfb02338b41a263a84fe. 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/TCADP1828472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4583d25b514f472cceb26c1e498492f0bafb6d9e46b79564cd0c02198e1f3bac. 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/ESA011590191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8379a709a9f567febf21ec618ca9a0c3ab9c1dd97988b5818f6b2fd48d0b2435. 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/ESA011590192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfc3893b1c6ffda083da52fa8f9bbaed0c1ff149a6f249fe42f1985a95760f6. 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/ESA011590194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e33b9f381539bfd5e5edc25b76896aae8206a1a042a3890fa03428ad780c84. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ESA011590197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7556a7c125f57445bbbfdd9cd9cb3479efb7e7139c8cc7019c67c664e4196c1b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ESA011590198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21adfbab9acffb17ba896fef105a1d16a17ce8026410a9bf9e976b94190b5c6. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ESA011590193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7916a8bd328d072739fb82dbd797825111c17d9f257461851a861dd4437bbc83. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ESA011590199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec5a47b1b78935da1f5c580fc74093eb52d235d6bb7359549b6772a06fd0b5a. 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/ESA011590200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aaa1427a2bcb61e60bffe290623ef7f2f9a8e4751a6c94649f09ce9bb5cf9d3. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ESA011590203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefde4906c3d8cc5bf7e67f28b14dfc13054964ea4b91a25e5e5b5e7b001ad5be. 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/TCABQ1378805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb4424f39c58d84036adcd36df329ae6e3933509d6b4817c9ae1467253ec8c9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCABQ1378807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526f4c5efc76899fb649d6193aaaada2a28dd79bbbffa31289f4630cd6c9d904. 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/TCABQ1378822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8156c25036d74cbab9d61860f85cc4fce4706e440ee483071c3b6d29606b16. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCABQ1378827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240e8f6d7a3dfe99874ee0b322a7fd8b2ba788f93f0ba93cefbe7e62f1317add. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCABQ1378814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb8e1920c15f4ab44c614424639eb1d363db31a1a353c25384a7975776d0b47. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TCABQ1378816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe505935d5b0fdeb9aab3bc93381d9e5c33d3b8ce1b88f09960ee3693f12b272a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TCABQ1378809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cb73f6b4f19ccf785596919560213ff8f57711ffb0a923c3eb88deb46be9d4. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/TACBQ1378819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9f15e72b3943882cdeb002259913a54560ed9ccd2cdca5aff12df948b8a1f0. 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/TCAAT1022953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2de833b4eab1a9c1d388e387c7aa8f5d8a7ebe77ececdbbddef41e2649de1d. 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/TCAAT1022954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b0b8b1c3188c778e6f513678cb885373cda42d15eb5b194837f0bc13095aba. 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/TCAAT1022956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f91b135791f8f4bb706a4aa427f00c036db2e3425071aa92d949c0f6f5eb73. 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/TCAAT1022960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870c6a4ad12974952447b9b6386e66afaec030054c95f7d586da2b40915ac353. 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/TCAAT1022962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897e4f2510d28b1be118c41f1fed84bfa7a54ea764ac87d5b0a0c630fc356c25. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCAAT1022963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515e12ae36b8bf42c9d83594e757af00ff151acbe59f2c270011db40d97b2b2d. 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/TCAAT1022964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ac86c7000b532c88a3a5b3e4784bf1c11df04228a4fe3fcea5a10f1cab0339. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ESA011501021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70658d3ff3e30da2a8dcc85be3a88f4f7886a8acb93fb7bf5e125396e99cf4ee. 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/ESA011501023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6162b89087b44787783d596f1429236f98457d327d0dba6c59ffc12f75db3ac6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ESA011501024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd939e0c8c720947d68dbd7eaae50c226e2d84a1e1a4ef6832ca382c30391ca. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ESA011501013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094ee853d0b94294811f718a6c66505b0c6486da91449e3fd3fc76c57ebdc311. 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/ESA011501014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6ac31a45a603f7b725d6b8479396560586561b708aef4268220a25b74a6661. 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/ESA011501015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414fa157bd9aae2dc4c905bb2bd827e9b8f4830a46cc1ed3159aae1c54dabf78. 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/ESA011501022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc86a2ef2076426a69ed01f0a022ec12a8ff80cbcede72d00a0a5bab2a58b088. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ESA092203286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2159115537a4ac6e1b9012250d1c134022ea8713b12cdecc0b21eea9dad54144. 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/ESA012211636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8ed1f89b4c1252baaeabad1fb4556bbccfad1314e00df0fb2c7aecf5367020. 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/GBMJG2120573.