Mid-Atlantic Sports Network (MASN) is an American regional sports network owned by the Baltimore Orioles. Headquartered in Baltimore, Maryland, the channel broadcasts regional coverage of sports event
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 0xe65da346ff964c5eda072dbfd6682376e9efbcdf8b860f4699ed74c1601056dd. 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/4276b1e4-274d-42b1-a241-295489ef549a.json and https://artists.proofprofile.net/proofs/artist/4276b1e4-274d-42b1-a241-295489ef549a.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 0xec119508560a429e251c44c5a730f3dad69a3c1dc425a0a18d4b7ff261d4593a. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QM2PV1812503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bde3148ce9cf0f88ec3e2e294e5b195b1dee78f16a56a6e47a4943d49336531. 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/USRV82000778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e3592d749eba4d66e3eacc0445dd102e525591361d90a4ffbca359a36a9c95. 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/QM24S2403232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eaf33bb815b17ca53add0a218cca59e337b392074c03148f4fb3944a5488588. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/QM24S2403231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa86235e417fd05347481ff27ef3d9f84f2485d0f46e6bd7ec5d81d212e15ddc. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QM24S2404186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4d8f2a7251004db8bcb6bd6b9437efc3d8a38edda809c217de4ed263a27833. 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/QM24S2404808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f52e79deb2bac8daf5aa0d9e4ea710c3f8ae27edb1295f36d73a8b3ff928df5. 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/USRC12002766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38852893c08f7611975300761ef37356e5dddff6747b6816e8a04b4b9c7592e0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUS12100804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd92b4919470a63a72dc16bd648a62096a64164ccf558f7b00383f6c63ade8bf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USWB12100964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f52e79deb2bac8daf5aa0d9e4ea710c3f8ae27edb1295f36d73a8b3ff928df5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USRC12002766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38852893c08f7611975300761ef37356e5dddff6747b6816e8a04b4b9c7592e0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USUS12100804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62734811cbe3633bf0caa694993ff583cca91fc061af23e3ba6b7ca981cc17de. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USSM12204023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd92b4919470a63a72dc16bd648a62096a64164ccf558f7b00383f6c63ade8bf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USWB12100964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd147ebd84e8a42c939c5788273842d3c1bc87413861a6c7e04d39e0ab1259684. 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/SE5BU2304048.