Black Map (stylized as BL∀CK MAP) is an American post-hardcore supergroup based out of San Francisco, California. The trio consists of Ben Flanagan on bass and vocals, Chris Robyn on drums and Mark En
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 0x9f0f9850ff34bc2ebf8037e0851cf1679f704cf31cbc300f6476edcda2421e35. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4c042bd-cba0-40a3-98e6-b9dfb4adfdfb.json and https://artists.proofprofile.net/proofs/artist/f4c042bd-cba0-40a3-98e6-b9dfb4adfdfb.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 0x8b466e7ad8d6e38258f4fd72414732e51604528b8421f4bd65a1719112389346. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QMYKN1400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea57b063ac0a5c134b280b8c8d4702c5ff96c4fc0bd0d3bdc4c57afab373d8cf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMYKN1400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d1f4764e2a8e821fff7bec18214467884532bc7299b5a1ed6fb038c54b45c9. 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/USKO11602086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a444c850b7a8c1dc9773b2354510523351fd88cfd61af1c6628fd45161b1374. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/USKO11602089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1946b8ee7780a47c73112ed76c624692dd43745374721bcd55be9c2a9ab2475. 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/USKO11602091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0386c9cb9ccef38711220d75ec3e70189f1c98da0e0066b255dbb209d4ce2b. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USKO11701793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01797d2bd80fd64f0f2ef4f01036e60d8388c9f66237113caea5468251774844. 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/QMYKN2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5507edca3e39db433ec2da556bf8df2b318bacd8609caa938995dda42aeac06. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMYKN2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc699cd688b7d4ccc708442807e1be4a4a6087754dba409d0bf30c8567862276. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QMYKN2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710a213a606783ee8aecd0fc266730c449444baf9975a1906795243f608be0c4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QMYKN2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b22617f30f751c97efed459d2868973254bcc003919b1b2833768693764cf1. 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/QMYKN2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8855641ae19d0c0dbe94b6e6558f03bbccf8afa656d81f79464de3862ae5650. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GBPVV2404113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8855641ae19d0c0dbe94b6e6558f03bbccf8afa656d81f79464de3862ae5650. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:20:09Z), 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/GBPVV2404113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ea6e192c22b8736ef2f9d280beb0a548b63fd98e3e53a9577901189469c3fc. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBPVV2404114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8855641ae19d0c0dbe94b6e6558f03bbccf8afa656d81f79464de3862ae5650. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBPVV2404113.