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 0x96a7e43948413b91edc600d7313155699126c8c0e8a4b7a1ac2b22931c1675f8. 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/a0dfd6d4-e5b9-40b9-b940-56453d4e12d9.json and https://artists.proofprofile.net/proofs/artist/a0dfd6d4-e5b9-40b9-b940-56453d4e12d9.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 0x08c5456b54658178fcaad36417c8899089330c7058661b48f54db752351ba58a. 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/SE3AA2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3163abe9d0f837765da26f09b230d5a02182081571193c8d8b5cbe0b14e50c. 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/SE3AA2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e3e52d2e36400f7a03303b0aa04af5f3aee738f510f7a6bd215629696b5e17. 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/SE3AA2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf961464701d61c0bfe28ee4a34ebae4a35c2b82400bada58d48f97df83dd982. 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/SE3AA2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e60a53c636bee311e07892f2c5b757c6d380389914346c931aa6040362826c3. 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/SE3AA2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e911723ffc3c8d3226d2ce36f52e6a232c0317c27e63f4638291d4669647f16. 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/SE3AA2000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4161dbca462078a446b90c9786ccd7c145abaf9658877d48f690187cc33cb118. 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/SE3AA2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455d949a8fb50129eb02ee8cb68a95840d7d76e8ac81d2bddad98d4ac2832fb0. 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/SE3AA2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f17cd0d6c5e0cd90a087e31886d4847e6192768066d5407045cc72161c8917. 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/SE3AA2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6db8e5b79da8b90f9b334634f7599e4d5cbd971141f0f3f143871d8638d3e06. 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/SE3AA1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80e3042d0c4d54d44fd1f55df65d384f65df0f12961a5fc1aee42c90e778018. 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/SE3AA1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ea925907d165e7ee54dba44f8ae060ec61e598341f0137f843aaaec49b6743. 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/SE3AA1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f515e51eab03649a819cc8b4899788d5ef1065e5434d8d7d229ecf8c301a43. 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/SE3AA1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593e1654177a66a072b84e98e8cd0e0e32acf5b8a04135f81c4b0663861da460. 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/SE3AA1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713368ed26c098a16c2a3fb5fb72d9b6c831ad77eab4e4df3e5c163cf4c26db7. 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/SE3AA1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9785e3861857cd98e37e8bbd520adb081511b1859402a4bb1115e32baea88484. 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/SE3AA1800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812834f9f48398508233dce15e4e6c19378a3fadc8943da31d6a3268355624a4. 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/SE3AA1800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dd1a8344713f32262f82a84581eaec3437151fc41bef6690d1d2a2d1553127. 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/SE3AA1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a4bc5ae07b96284c4012e766673cd5f8337815cc0a8cdd8cf00346e24b96c9. 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/SE3AA1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1209c3e36a5b1c7874dad02be9e581b639291a6a23c60c9122206cad0574314. 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/SE3AA1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd8c3abbc161a96b722139e8872b86032fd8d85143249ebd2b7ab0dd80e2018. 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/SE3AA1700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42de4ee550c77bfdd39fdfdd90efe347aa8dac849aeb7eaba36c7f8593eead78. 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/SE3AA1700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483ec2589ccc0eb1e55fd02ab24c3e126670c8ae1ca25adee09154ed62050be4. 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/SE3AA1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153ef326e5f29316167e0114456c34af39bba4558d701257fc2b0d9576e182c9. 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/SE3AA1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0391ded3c02d84c9c1756b55de68368b1e8f618153aee918600ed27fec275b89. 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/SE3AA2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b2d656420a4faee69b3b30ac3a3a9cedeadb7fef97f7a12bc461b456e43c3c. 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/SE3AA1600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c90dc4f9d3b122e80c480d70d22ae841ba3c08a5eca705dccd4eb09b94bd8c. 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/USUM71701833.