(; "dance band"), or in Norwegian and Danish, is a Swedish term for a band that plays (; "dance band music"). is often danced to in pairs. Jitterbug and foxtrot music are often included in this ca
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b19f376fa272f4e5e3ee4d08eabb9bfb55fd4fd6c9f534d1e06e3cce01bbfe. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39a43555-593d-41f1-8300-4041d9019266.json and https://artists.proofprofile.net/proofs/artist/39a43555-593d-41f1-8300-4041d9019266.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e3401800e1cf47691bbdb27d514a7d2de23da4754fbda75bd9c6e4f28f4b94. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZFZ22597530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cd0d50259fe6acbb81bf0a151411aad24edb1cbe822b133ebb7685ea8d9d05. 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/QZFZ32510725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfd9592a7f28b3273d970944206a0901ad4a17c8029ca683472c6fb1969ddc5. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:03:12Z), 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/QZFZ72515239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495aeeb4645167048466017cb2647bc3df81d7e3dc0532eee7ea1ed9143cf44d. 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/QZHN82502133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b1730b5bc44eb29190c27b4a59f75f7967cb85a4dc1a387f29eb4fd4803639. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTB52594708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10146910172eed89e49a567fd1f75d0b034d85e9e86ed05e203551728a4203ca. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZTB72578772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef6165884725054907b7fe6f10618eda57869f43751567576c83f2762130dac. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:06:12Z), 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/QZWFH2586053.