Grade often refers to: Grading in education, a student's performance as determined by an educational assessment (e.g. A, pass, etc.) A designation for students, classes and curricula indicating the
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 0xe0f98f782d24e92f3ed85325909a1921ad328607c06008c829498bb89800efc2. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36c352a7-64cf-4b5f-9b02-c7f40a27e6c0.json and https://artists.proofprofile.net/proofs/artist/36c352a7-64cf-4b5f-9b02-c7f40a27e6c0.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 0xf5eee689dfb515b0b384b36fc01d825961a0d8d50e2edbb21d7bdadef2cb4c78. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US22L0400901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c754736c8b018003ac3c1cd4178e12cb4c4441cc8a2e6e2e164c8b67cc7bc01. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/US22L0400904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4016825c08ad76105ff84584fe43812bf7c219b2e6826d41f2ef2a6b48fcb060. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USVIC9910902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9ccb7bf1b3422230ff36551bde6e797920ef1ad5e5697dd7c024e1fc4926a6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USVIC9910903.
The Tension Between Stillness And Motion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fe49e97ac5137e89a00298407db80c97e6f62c7ef1d9a7a1a61d108098eb57. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USVIC9910904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b1a8bb8989ab95c76dc968ec5e1a99119dd0116fa9c81aa0c501e19fe143fa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USVIC9910905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d98d9f45483c141cd85139b1318a5c289d3129ca037a43e2d315a673da3bb7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USVIC9910907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcb6517f6a34825cb573bec4dc6072dbc8fff090edd92a6d2bce610cd6eda08. 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/USVIC9910909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ce8afe41949abe92a22dc27a4f45dfe7970aabbaa9e1f67822ee32dd647b14. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USVIC9910910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6947f9d2e798fe6f38a3b872a0af8908fc8c359b2e3c1e78a4b21fc7be0fbbfe. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USVIC9910911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e35ffa3e57ec13b0b908a8fa08ff7e3ffeb788319217af34849aba960f60822. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USVIC0115001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdd7136f1bfd6e2f91c4777a510fb84857da48094e38e8ad2447f8ca1c17e65. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USVIC0216604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2473c2f6dc304567ece3a79aa5d7d2f2bd4aba666a90d8ebad538f2c4ff01c47. 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/USADD0330518.