REDIRECT American Society of Mechanical Engineers
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 0x13f29e6dc58f7bf310441c45baca35cf4eea3a768eec44778315d17cdd5f6950. 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/7020d3da-8238-4763-b0ec-09c6041deff1.json and https://artists.proofprofile.net/proofs/artist/7020d3da-8238-4763-b0ec-09c6041deff1.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 0x346265abb43f0329a29ea532c23a5d1e3e06d9ae33ae5449c10cce72db866171. 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/SE6QE2075220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adf99e6d55b6568815bbb6085133406f9a187ec88871544bde6e5366412e062. 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/SE6I32480815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0719ddf383f4bc6c54f924eaaa478d809b0fe82955e43a540896d787b014a35a. 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/USZXT2351148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86eec5ebfab51cf90efbadf150c72fcae50a3576b103d5fae19aabb08419c6f3. 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/SEPQA2100126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da5d19b6c3febb8abd75f5c5397e140ab1adcc1b5e17c6849d4a3877451b807. 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/SEPQA2100127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa116f4282a31174091fed5669c39394d510f8e222f53a1092e97936ea77a8c48. 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/SEPQA2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346265abb43f0329a29ea532c23a5d1e3e06d9ae33ae5449c10cce72db866171. 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/SE6QE2075220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225fa0cea9cb162d14faaab271ceca13f8d2e08c4da855e6c8275ba6edcabb55. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/SE5751954792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab2434c6af85e7d1ea9763a82766e798f4b6a2e4ffb673365085d1970f08aac. 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/SE6HN2058780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f312d35237f6f76d525aa9b22b8ff4193e720d8e5b12a5cf657e1053eac696d. 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/USZXT2352346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab462038801227bd4118e7c48e1141cc8475a06cfa39f215ee6c99bb7c71093. 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/SE6QE2048113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1796af257ddeb9c1b94107f5667f4f874113c55a8b5e68b4eeded5214718f35. 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/SE6Z22200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5db861b3645c6a0e3b4e3ce3c6add74045fd02f9caa04ce464cd56d8dd3eea3. 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/SEUM72400920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d1edc8cc415ee2aef1cedcd0e7fda89e350a317537303a4975ea8c1a3ec23d. 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/SE56I2000121.