Colours in the Dark is a play by James Reaney. It was produced by the Stratford Festival in 1967 and the Vancouver Playhouse in 1969. It was produced by the University of Calgary in 1972. Colours in
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 0x57166a0a8ba32c6ca2686118142461fdc9ace2807fb55767c7bdca3cc02a819b. 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/8c03cf02-1361-493a-ac87-a94a98d59896.json and https://artists.proofprofile.net/proofs/artist/8c03cf02-1361-493a-ac87-a94a98d59896.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
one year has passed (look at all we've been through)
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 0x8673c7310c390725a0e1016e27601b6e4a986d6f1d3c17cfa1ee10f406038166. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXDS92100001.
three years have passed (I need to find myself again)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d4636108f0641e5a7d3cc3fde64cf10097ed133315207b9743e9cbce153fa0. 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/BCD4N2300140.
two years have passed (you'll be forever in my heart)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f38547d9f1a810f9075d02d694c7c77e5f9facefe185b62df4200df87a810bc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXDS92200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a437b79236245ef3a2f7250fcf4655015bc1e00025281216bf7a041f3bf2114. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BCD4N2300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0482aa6b2ff50244001ffe60bfdb42ff6d5e5252b43dbcb237cebd001dda42e6. 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/BXDS92100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8d08d86cfafc34fa0819be71afd76565e7d3048e1cda1221120a3e42ccc051. 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/BXDS92000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d5b870884be37472d91fdb550c265fe994f6b9d6d592f320b1024b7876538a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCD4N2300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a965a3f687ef7ba05bd1ce3d6dd584a0b7919b883cd3de0f0c295a298361962. 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/BCD4N2200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b142401bed93a13633a18ec34024de5d8d121c661fc5e9603f304f5c5ef9c0d. 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/BXDS92100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2967073f2cb82fe77f4e9ec835ce4fb3880560e4d575f87d84beb8a21788fe91. 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/BXCMR2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6819d8c1a9c461b98caa874aa7fa9b0c68b285f55cd329913eec74c73369b548. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BXDS92100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d47ad3f056ee006fc66592667dad9230e3e3ed606d2d721c3470ae7b76369aa. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USANG2197200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7542519a234c4795e964645b469dc2045c9d3271c8343277fb4ba647df8f8dd. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BCD4N2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26d25fa19e31330239e50a72cb8c56bc84735ef073a1da3922ef8b658d97a32. 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/BCD4N2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c92afe997fe71169b5f3f5de7a59b09f27279bc4215d799c34db00a99b300a3. 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/BCD4N2300243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f82ad6190be3d9fb2644d857916295cce5cd9e7a53d826c509ca56ea8292fd. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BCD4N2300242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372b81ab0a63e7ccb8fab14a928026b520c3d61869216ef5579ba4c28562c41c. 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/BCD4N2300244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab434c8fdc3dfbb522de4fcf678d7cdf76b71aad6f97594cc3c33b3ebf76ec0. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BCD4N2300248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1730c40bcb97908ddcf8742804bca79ef3822a74d668cd0912ad317a990b2e9e. 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/BCD4N2300247.