Eagle Wing (otherwise known as Thirteen Down) is a Patience game which is played with a deck of 52 playing cards. The game takes its name from the tableau which depicts an eagle-like bird spreading it
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 0x9a104d366e624883c23a5b7969e45fba00ec210b4ee157fb9b7a5f6e84fe64f5. 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/5a1d54b8-1ee9-47d7-874a-0373c28666a1.json and https://artists.proofprofile.net/proofs/artist/5a1d54b8-1ee9-47d7-874a-0373c28666a1.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 0xaeb3bca0f1c1a348b2b7413e836af205b78f758aeb037ec899c0a9b2f6b41410. 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/QZMER2494630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7ff9bae10f261f85091a2a18618484025f4925579a26279299f06a0b3dccba. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZNWX2412999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b95c38661a6fd6f4a0a99f83868653e3263ba14ddf4109ce9783613e27a632. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZTAS2486141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5686ae30539a8c9e44e107d81f2a929fba19726255807d23635f223c7de437. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZTAT2435645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf937eadeed2e69a8cb4abc6b7e0e81f8098b97866e2a39dc65c85e7c53e91395. 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/QZTAX2417035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf123461a442c9c5cb2ff74d744486c874239e3d4ad97e00bd0df916e0f022996. 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/QZTB22497692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909f417ed5f77feb85bdd5db00fb817ab39774f9429ac13d4053a2ba15f9a4c7. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZTB62462655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150ce33a959652315f0f0893480a8e197da846bb9a78c0a527d1ad150e10e575. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZWFG2436743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923d226f903dc7c54230d64f77cfcf127e6080701b244638599525f8228bf749. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZWFK2445305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328dcbebc26999d730862ea233784e618749cae659f107ce42ecccafd69a28f9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZWFP2481087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b95c38661a6fd6f4a0a99f83868653e3263ba14ddf4109ce9783613e27a632. 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/QZTAS2486141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23b0becdde1a1f2baf51722656ba249f072f2e0e996aac202419a726c8da3f2. 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/QZTB92465332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2338126f5828babbbef71abc7a40a9033c60f9e2b737e0e6fd4b3b72bd5e4408. 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/QZWFK2425984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5686ae30539a8c9e44e107d81f2a929fba19726255807d23635f223c7de437. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZTAT2435645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2234b225333217487938504c69d4e149c3f93c2e3d1290eb6a8838cb7688d313. 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/QZTBE2424520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150ce33a959652315f0f0893480a8e197da846bb9a78c0a527d1ad150e10e575. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZWFG2436743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96600b9b87a0a359a75518ceaa3a482d20ba8214007c0fceb0ceafd48f9efa57. 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/QZWFS2445170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f0bc415a77a037029d3df286d7cbbc1276bb5a44693823592f990f146990cd. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZFZ72598361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b187b018eaf075b511a5c6a4c10b20cc3098ab12b227763f07d6e91672546bc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZWFE2455746.