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 0x3df4d7b36117efa00464f158f8df31b8141a31c3977648e902fbb336d2c8d165. 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/3922968f-759c-4d17-a857-be6ec2731dcb.json and https://artists.proofprofile.net/proofs/artist/3922968f-759c-4d17-a857-be6ec2731dcb.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 0xca8ee59d096a6f9cc4d7a85b1f0e40f302838a286e347b4b5750c692bdbbea54. 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/GBLV62037538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f87d59caafd472cf3d584dab085a15b9a5ed1a6089b5447bb89266edb5f50c. 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/NLM7H1700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c9c3e1b0365b0990d0c489bf50d53ab8f638b3bda5a01dfd3776fed649ffd2. 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/NLM7H2000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b9fad42933dfdb40b1f46011abaaf588b333cfad913f3879a398cadf0ee06a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NLM7H2000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff7fb8828808b776fb7aa07f7976f1eb5d161cedc920f6b92aac28ed0a9552b. 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/NLM7H2000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb644ef51f5889acae9be8d2d7c2a4bb4f6c0a377207f5beec758e74b7d5e4b. 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/NLM7H1800069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee44c2e3168774fe7b2f5188cc372808696493573fbb47b13f404915b9bbfff. 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/NLM7H1800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13cdcaf22d41c13d5aaeed2edbd92d80f650393b3ef037707391707e0b0c044. 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/NLM7H1800072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76668b2c3bc2537f6178dae6e3820d26f4994844f01335cd412682d1cf4aa97d. 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/NLM7H1800073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681d3f8717331fbfac4a444a61103917b8aeab244d5de48e49ea24a2dc76dfed. 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/NLM7H1800074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee23e4816879653d51d517df345c9e143c784ca716b9a3e791eb1d5ac09f406. 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/NLM7H1800079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb3b533026f5fb84b3807a352c61bfe626a62dc2d70748c276778a021315fba. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLM7H1700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8110ebf10a50702734a890d081a84f346f3f80fd0dfb9f9e2ccf813fedf1d99. 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/NLM7H1700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5521fad5a298ea062a23b713361ce8050e2429a7aeac08ff87eed470b5c7115. 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/NLM7H1700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b0ae0f809551c8086e01e99198665cd5746cfa9b366624c3a1e33e61664817. 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/CA5KR1042047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6caf89a5a64b931b257490079e58b96eafcc619287676bc71c588048d418a4. 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/CA5KR1042048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ca51d308f944cb247634535f521e80173d40d33afe8fb9ea87780c154451cc. 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/CA5KR1042056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2044ddb17768b0f9e4bb5d82ef0db831d7e850db5f1060147220b99b1f89c7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBQZQ0800162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb956db0dc739aaef96120631d21af93b7035c1e6cc5eb519eb94300aa755d4f8. 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/GBKQU2457940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcda5fc98c7cedfe66311b14c2f47b1b7e49a4996a9ed87cff977817b60116c1. 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/CA5KR2459537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69faea8b83d2152c23dcae5923d4fc0d398729fb1a12ae892614c764b36bb9fb. 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/GBLV62319528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8e6c4fa8e98adaf28628d940a368b10fed6447c7ecc3da5955e267fad96d66. 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/GBLV62319529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7c28b676fbda3bc71993f706631968fc6c33a2b0a89d9accb10bc341b43ef1. 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/CA5KR2268126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a121f8535fed9fdb611336044b0604253df510f5fdba767687079e61d53b8d6. 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/CA5KR2211385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c29606a2e1083c88a634195e7db0bdf3ae9154fd325c78203b3aa7bc4625e0. 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/CA5KR2211386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b1478a7f8c27749042b33544164f4c06104a81c6ac73eb4c5c8430cda3242a. 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/CA5KR2211387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbee8bf5fecbb00a3de98e7662562a47bb53f36b428ddf0cd1233034047be43. 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/CA5KR2211388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb1737532bc5129eaa014bc9977907426ae2117a22b1e511ff3532d7b9f6e06. 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/CA5KR2211389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4236c5164139f8e6d5c6cfa4b0351a30ce2b1a3ba1c436ffa74bbdddb15e8b89. 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/CA5KR2186040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf692b41357784ee5023bd0c007b4cc07f85b861bf1e7b14e5d72b594e5c81a9. 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/CA5KR2186041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eefd91802dc2d6194760e2924aeaf23a28a64b8e866420a089632c5039e0f84. 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/GX2Y42100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9772bc45b1a8885091eebfd2402daaeae53e373d8026b4ffeedaa81c673571. 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/NLM7H2000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d014e892bcc2a917e13ad7b9ad79dd06d41b09f11917c3452862d5a1b84d08b. 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/NLM7H2000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfea86bbb82f2506741a4c3b91cee545be489cd985f5fbe6e90907139edbb8b8. 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/NLM7H1900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe123f588de7ff7ce00cdcd86509b5f3e034212f512e8acaf5f0478faa15e50. 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/NLM7H1900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17f053b40977dadbb1eb812a2504778ce50343787d6e643dd944a956a92919d. 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/NLCK41056031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93221c86851e0174a23e5ae151f0d6b479c270d83fc255c43d2512a1b85b644c. 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/CA5KR1557411.