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 0x8516e7cffed80c8d29c5494d437985b4336cb477802ff485f8a081e94123edd2. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5550da2-d78e-4872-ad39-1c091bd881f2.json and https://artists.proofprofile.net/proofs/artist/a5550da2-d78e-4872-ad39-1c091bd881f2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Where Color Survives, Part One: Struggle
Where Color Survives, Part Two: Fruition
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 0x6d53a79991f22b90e769968989065398b39a442f74b571b3a55a5794077e851d. 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/QZGWW2048135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a6c25220625af908dd66ea93cb1cf2a4d46d09afe184b4237fde79f5b35ae8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZPJ32261924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e009d76a80f9e64616afe36c049ea6bbb86b2e3009e66c51fb5593897580d12. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USHM22479469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d0cc05ab45e2281e8e0790212ebfd86f96917a69e789efe1009b7b03596c45. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM22479470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037f5026ac796d46c31bdcd2e8490aec7a075fc9a6bc1fa132495a3c0c05cbb4. 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/QT2VB2514788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2489839bacc9e216ace27923d367d84bdb4bf74fbdce8a862935403a62feff. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT2VB2514790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e921094068c6e70fcd523dec0eb5d1a5e4de1fd34a2c5a85ca085e861c29c1. 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/QT2VB2514791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dfbd0c7311446a1bac4943e77f4b4111c7266a666ededca98f4b463fce28dc. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QT2VB2514794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434d98b1f7a66ab04a8ae93ca9c2bb8502d648de37643f6be27f843f144814be. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QT2VB2514786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cdcad94cb0b40a5c1922664df7c46fa57cb0bf23e663d363da019ff6a1a5d5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT2VB2511240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22cb95833b4bc7ed53b745dec1430a172cb9b42d23a047ab8a84f9f18cd3fb2. 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/QT2VB2514789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2489839bacc9e216ace27923d367d84bdb4bf74fbdce8a862935403a62feff. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT2VB2514790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e921094068c6e70fcd523dec0eb5d1a5e4de1fd34a2c5a85ca085e861c29c1. 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/QT2VB2514791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622a025219ad2140b92ca5d2104dae414dc958c2738b560d465f0e88ae9282aa. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QT2VB2514792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a72dcea444b4cbb2c80f18ea78cc2659b27c919993ee065e86bf0b78f6f5959. 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/QT2VB2514793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dfbd0c7311446a1bac4943e77f4b4111c7266a666ededca98f4b463fce28dc. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QT2VB2514794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434d98b1f7a66ab04a8ae93ca9c2bb8502d648de37643f6be27f843f144814be. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QT2VB2514786.