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 0xe1c85fdbb7fc8b961e657d5f9e5e43af42bb55db3883c84827642714bf31035b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d16634b3-a727-45b3-aaba-f09fd1feff67.json and https://artists.proofprofile.net/proofs/artist/d16634b3-a727-45b3-aaba-f09fd1feff67.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 0xd353a2ea99da67aeda60642f3fab62a6ca4e401bc72938d84fb0947df327d2ca. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/BRPL10600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f39ff10c90a356b53a2172a6074fcc36b0ee37f6b2b945d5f8432b37c90cc6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BRPL10600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870dc013ac00c11f6c97dde0d2ded8ddb62964d7cb4bc5553ac428a15fdb5a51. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:09:43Z), 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/BRPL10600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2019596ef575374817ecbaae65fd1cf2fd22dbbd02c076a9e399cf8153b1aa1. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/BRPL10600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef1bd185837117cb41601e7fc0c00098ef16395dfc0f2a40b840aa8138b5be8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BRPL10600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67739a080870d9ad61a78fef5cb58cd10a566850958ca9bed7c24ee517bf147. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:51:26Z), 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/BRPL10600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0792c4b8f20e4af28fe60a6dcc8c60c2c272a32448cda8f8c6de8db9ad79c359. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/BRPL10600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947c6e788b95bd187fc4556a860f0c2b0d24676e4df36a3d6d0312f941941851. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BRPL10600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f52e2f9defefc4d64b1542600053c26399d388d58c879be9a800e78f203ae04. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:53:43Z), 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/BRPL10600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7ccdfda168ed0db75bb3815ac5106262e5e87e3a2dba8e93f5f0152b5d6c03. 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/BRN8V1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ebf65b194b354bfb5e35360e8fda6ff16508163c739a2139b77e596bb6f670. 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/BRN8V1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbcd41dc8bf73eebc26d1e59bc39e1e725985faa7cb54e7fe30383fa8cc26a8. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/BRN8V1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23e826792f62a9bd5629ef07b3b2bfa76c27faaccfb23e89cdd4d4726e510b8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BRN8V1200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41283b7002dd3059b01cf72c0ced522b6342242f94021d0453ed0b4d044bb97b. 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/BRN8V1200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c97e0779ecbacd2aac5b4ff5f9f9304511feb51ae7cf3112cd492433cad5fe8. 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/BRN8V1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab210567fcd87690a9dfba3d07ef24e26b17fbc743ae1ec6ea2153251e86760e. 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/BRN8V1100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99397908e0116a3f7f8cd450767951be022cade6e11038b9accb6a4dabf4467a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BRN8V1200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2fae9cd00e2dd0594f2188c5b8f21b4f80df57a49050605a150c694af1c651. 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/BRN8V1200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd57e9a0f36f484959ff8084722d46e930625dfb99920ef953000100d4dd0f94. 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/BRN8V1200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766bd01f7e3b5b19665d22ae8037be4381696ab326ca629d474846033afd2366. 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/BRN8V1200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d710090a9b960dc29345103b7c29f765bdcf74afbe4a281a30ff4292415bf7. 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/BRN8V1200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bc5e37de5c0d6f7aea9035828f672b926bdea901296e4493a43fb0329ebe4d. 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/BRN8V1200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bf8db87e8a0df06e786820f6723439b289568bfde5df375b845c3c1eb7713f. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/BRN8V1200002.
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 0xf2fcd817b1bd8d8cc3340d4a32e0794285d3b14ca697389ff54938beb47686fe. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/BRN8V1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf534fe0d6d68781c1661b5d81aff13880f5a862bc562b5bda554efb157a8fae. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/BRN8V1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3341f85572e832a5d095a202162dbb4dca1e901dbfb593f360b6da856460cc20. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BRN8V1200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2f921da999c63703be802e6922807b75de992f3a8a7e3dc4809562a0a66f6f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BRN8V1200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a1878189cf119e04ef7a36c769ea2f93555084e35e90b37f45cb056052611c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BRN8V1200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f710cf92eff904c4a34418405f97032b45a9132274640edfa914e0f42a7368. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BRN8V1200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2dde7335b5dc9da9b94de9dd449717d88dbbfa9e46447ad709cbf580c7b090. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BRN8V1200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb726c1f50e0a72a4678dc83e554d5cc2e97cdd29949a4782d3f372f1749750fb. 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/BRN8V1200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa440774b23cb001dc3404a0cf162d294857423e9eedebe64e2bbdbbf7b34b41a. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/BX24T1800011.