The Classics IV is an American band formed in Jacksonville, Florida, United States, in 1965. The band, founded by Dennis Yost, is known mainly for the hits "Spooky", "Stormy", and "Traces" (released 1
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 0x14eaa17a0ce7131910ee294420b21fc175a75534458a02685884312af20ecfb3. 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/6f2a73fb-faf6-4277-87bb-b12466bcf420.json and https://artists.proofprofile.net/proofs/artist/6f2a73fb-faf6-4277-87bb-b12466bcf420.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 0xd14ecd6ab0130e91648159608fa989a74e3cfe7c743d0e59e9f5bcc18a8d692a. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/USCA26900320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b697d4fc0fd3f4fe2fa93d869641877e42bcbf025f7de66884a1be7a36a8f8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:04:43Z), 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/USUM71809639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf02b77ce5f11f9958c77bc6f2a7d38bd2a592de6bb0b54fb18b6e4e7d8480a. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/USUM71809640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4deac24bec402baed3904dc4442937f436a0facf813307468ecc1261c06a05eb. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:21:09Z), 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/USUM71809641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02e069151faaf739562f752952ce2812dbfa7ccef2f95afaf6683cc9802428f. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/USCA26900317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf20fb3298cbc543cc8e31a8d39d1ece013ba700add0aec7e3e71dea26edf9b8. 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/USEM30400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa128f8ddbd08e412ddc4b735c62d0e4afdc9bfb66aa8a34f6494ee4bd60211c6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USUM71809655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4028de0199f6f4d1a02bbf81b120609a6b6c084518619a7187b6a1118e0439. 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/USEM38500118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbb8093b8a60471d383ff5141a5ba4692e2d301eeedd6a1dcb00d2523582de9. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/USCA26900319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a705ecdb658e1efa4417c14f7977f40c1e684fd348ef786f51ceaf7c65a91a. 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/USAFM0900350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64eee244a807b5e41c2750f36be83d88eb76d8c553d55869401d87a320bcb3ed. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:01:22Z), 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/USAFM0900352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884fa8b40e9a7a0f7048b53ae1ce1e2602b71de0401edff1a6188f8e0772afa4. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/USAFM0900353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a6a8984c6d24105db7e815f39da4f85a682107a0fe86399d0b9e26d5ad7ccc. 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/USHM81164596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde31c83233d2796726734eb895afe2ad57ccd5f7299e5d02245bc2a98ef14a7f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/CANC21206626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067214626c41759a95e2130812cd7310a0a301c2aab355354bb7402ef49bcfc2. 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/USUM71809651.