REDIRECT Metropolitan Atlanta Rapid Transit Authority
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 0x9d4bfc01a96e737c94e19bc36b0241105840a32082f4b66e9f34dba91e1183a8. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6c586ae-5d53-4a05-be0e-ee986e629c2a.json and https://artists.proofprofile.net/proofs/artist/c6c586ae-5d53-4a05-be0e-ee986e629c2a.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 0x56656a7c7f6a715ab3f550f3854a3f4f04068fdac6230741cbdd97110a87d695. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GXD7G2529940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf64b024af1f42614217e7fb2292a21e51018452c2da4a884088b373afd183ba. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/GXD7G2599880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ebfbf81f48aa49ece671470ba0758959119a5dbaf4696268d831e49dd9c6ec. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GXD7G2537426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf1437c63ff2e81cee04ff40e6e678c8ddab3ca823ac4fd8b24bfe1f54b0c89. 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/GXD7G2557576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac98d1ccb94a3ba525268006673b1ae3ebef3cb4cee18a910a65bb0770bd9146. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GXD7G2537954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a98ffbbfe5dad9939d0e4b4879c65a4c9b019b05cec02ffab27e880028b468. 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/GXD7G2514123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527738fbe75f047178ccec5876d679a814f2a23ffcc6855511bd93d82e29a210. 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/GXD7G2506665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f2b0fa86daec1a5db86c86cebf312d3efba8d5a0eb6a6c7ada4957e92619ca. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GXD7G2563626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b24a0777ca05e9d7d5b9e3a4590ae89e2575e7eb86fb7609a77b4457266027. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GXD7G2507443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c15bae313be6f0b960221c8bb7d30eee85fbf6dbc5712e22fc6e7b243c85840. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GXD7G2582367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7447b9150c69e3c03bea6198ae0023117ccbff9ce0296601f65ec55a5d216e34. 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/GXD7G2535960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6cf51676b9bce9b03fb6ddb77eab90bfc6de6b02caa10c04157df469c318f1. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GXD7G2595765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bbdfc204dd74d68ae9d96fdd6a03ed68ed44ae46ba6413293566166398531a. 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/GXD7G2513305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a998693b9aa906eab470d1bfe00d6adabccd59c55192e14e35a451c748d70a3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/GXD7G2522598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7e2ea51d0b2ce1e08421c9267deee30ae2b4ec72fad5afbd0176a9ec2a15e0. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GXD7G2535284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46edceb0731143bee7e180994d4afe86e62a631b369a8f01c1e204fd9c6af057. 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/GXD7G2569447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2d519f4f657925db18201aab18b1f297911f5c5d6053e9b79329a06c40135a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GXD7G2565591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5261c6911871a54143ef3f71df8f12f89018c6fb582bbc6bf5f9950da5a3e99c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GXD7G2574309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159e7868cf87de968f44b286b75bbf073647fe2d48e2e894c87e1b14c231ff16. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GXD7G2560913.