Sylvania (Latin for "forest land" or "woods") may refer to: Companies trading as Sylvania Sylvania Electric Products, a former major American diversified electrical and electronics manufacturer S
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 0x9e8e257df5f8d19efcd6e7b74baff381ec7c9469478fd80cacaf2fa856b91612. 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/987e0d38-583f-42f7-b8dc-2478d3cbcf8e.json and https://artists.proofprofile.net/proofs/artist/987e0d38-583f-42f7-b8dc-2478d3cbcf8e.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 0x15571a6a38935cf5a5016cd43a4adafdf1944450800a5a530703f2681ed4da6d. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/ESA011206124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6efcc6f9201231456c8d1b28111d1cccb7ebec02985040f5121c6a37c5a489. 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/ESA011206125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ddb006d7e3635585696c27eab7972cc2c202217b04cb925cc92549e2a3880b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ESA011206128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa469beb215de8597c83c5e56ebf8d2293f395040a092a3852900a4a61d8c9bba. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ESA011206130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ebcddc7803ecfe6376669214064c0b8c5170e6fa62a6c60f2c1ff218af03d0. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:02:36Z), 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/ESA011206131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c74dd442fc6ea46fa5140f3c9699fdff16ae80a4cbf73075fe6fd565df5b6fa. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QM4TX1592408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3d45428ebe9bd93487ccb256e3f6d302618faef31333bc2051520acdf580f8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMFMF1551485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d0c65ed0a7f7579fc79426a41aa8b23ebfc0d6a73d94bac59eb34407ee0c7c. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QMFMF1551491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1b73093073fe37f35e09d9556c68164de7c0adfed04e7171a39ad0064b33d7. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QMFMF1551492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc2fc3248b2ac15373b8a6216c17a04d04d60e830f796a7370b21b23b6cb59f. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:10:13Z), 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/QMFMF1551493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dde91497117362aad418da089d8d97be91b2250712aa2e2c988aea7d4d3a60. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM4TW1979289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1073a61e39dc2b696507fa3e3b533c932a052e93ce886afcee4a386574517717. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM4TW1979290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4fb247732b3f0edd13f49b3c8365635cab64b9c5c0178a0f80327fabd6d7e2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMDA72179548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96348f5d39077948453b64c25caf0d84533279203d7cb7e71026eacf8f144525. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/DGA0H2373250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b937d23c67014d5e950b191089311d36622fe9dd5deee20d3cb8ea1e055bb8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:11:35Z), 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/DGA0H2373254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c899c5944a422ed9ee12d2147a9257fcb1d6877f4a81e0ad3f7db0f5e384d20. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/DGA0H2373256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a74221f8ecea95fb75d1b3c85529e6dc70b633e1eb629bb421ce5fd329908ff. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/DGA0H2373257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe759bbc44ddc93077bc08b0bde46c6db8a9860bfa9e7bd61db000cb7a05a48. 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/DGA0H2373258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886a29afed8773a33fef857f8a6236208873f658d8f74f96e5d87d55c476c56d. 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/TCAFX2101460.