thumb|upright|Ace of spades right|thumb|upright|1828 "Old Frizzle" The ace of spades (also known as the Spadille, Old Frizzle, Lancer, and Death Card) is traditionally the highest and most valued card
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 0x2dd40ce26b39540cfe5219273fc6739bb882b4f38377f2ab2e25f866f32d524b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db5f0ea6-2cea-478f-ad5e-f1fab4b3ecf4.json and https://artists.proofprofile.net/proofs/artist/db5f0ea6-2cea-478f-ad5e-f1fab4b3ecf4.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 0xf883950a1eb1cae767f50c4cbb949cb284ddbdde1b66c147b32feea716dfafbc. 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/JPB601603135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee2ede12dc645fd06fe3fd5198e19a8b9e95ae504a883947bb9b2d6dbdd0410. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPB601603143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04d13cf93689ce47cf2c01b12d04b744ecba95827df0ed940079e776c5a89a1. 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/JPB601221601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07bd7e94cccddec1a8f67c5395ae0a0a3fc9324333ac2fea52734777b55ee77. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPB601900341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f9ea750262436905ad4564126a2970d52adce0fc6988aeb93bed689a3e1cae. 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/JPB601601886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847bd13b8ca8d464536ef30c77a6b65b6211ce37e8ab0ffaf1543c226e20a85f. 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/JPB601601917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf883950a1eb1cae767f50c4cbb949cb284ddbdde1b66c147b32feea716dfafbc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPB601603135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91b7e78679c97ce2fb37a30f33f035758f7c8a23908e40c17bfe28d45e297e3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPB601900342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb994249970070957bfc8dd803c7441bb98a7c842fdee7a41bac04a49b26d370d. 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/JPB601221603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d1bc77978285b9af329b09fe7783053cf53fc3b936253fc2371142120b0a63. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPB601900345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f32f4349ac62548bacbf46772421cf21c062f6b28fa351470121e5942e6ec2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPB601221602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c7dd379010f88e2acaf1bfa5cfff4a7fa59a1be5c27c697db61d8935b7a66a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPB601221604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0c75e66370a6182f5197b32572596b96b5ed1bceeb9433046891d380d33aef. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPB601900346.
Mobile Suit Gundam 40th Anniversary Album ~BEYOND~
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1e940942420d241b828bcee244bcbe10e9ab5d38dc7198c44a549d02adad95. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPG532001692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f9ea750262436905ad4564126a2970d52adce0fc6988aeb93bed689a3e1cae. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPB601601886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847bd13b8ca8d464536ef30c77a6b65b6211ce37e8ab0ffaf1543c226e20a85f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPB601601917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04d13cf93689ce47cf2c01b12d04b744ecba95827df0ed940079e776c5a89a1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPB601221601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f32f4349ac62548bacbf46772421cf21c062f6b28fa351470121e5942e6ec2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPB601221602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb994249970070957bfc8dd803c7441bb98a7c842fdee7a41bac04a49b26d370d. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/JPB601221603.