"Have a Cigar" is the third track on Pink Floyd's 1975 album Wish You Were Here. It follows "Welcome to the Machine" and on the original LP opened side two. In some markets, the song was issued as a s
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 0xd2e79ce51a11169438a74a232f18987796b65d83e1d931205ba0575a9ea1f7ce. 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/6e588b11-d834-4981-8b1d-57608c844df2.json and https://artists.proofprofile.net/proofs/artist/6e588b11-d834-4981-8b1d-57608c844df2.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 0xd5d404b0f2d04afdb05817f999cfde617e94d2289c91df2d8b9458c3e29a3a7f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BED071900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddba79392c2fb9d5f6253f4f69355611143717cad79d3763b468baa0720ced2e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/BED072000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a3a63b540c04b2fe77adf19788e68965ef018a52f57e20d13d7b4723606905. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/UKR6V2012263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3783228961ead00a783b4bb5c35da48c072643906c767fc58c6e23dc334cfc1. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/BED072000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d6c27bf19e09a0f0f0353a4ad8814cfd4735a7fa1cf4a6b4c85c53236e66e9. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/BED072000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27f428e8040998f67e7d10ebed53e1cd2fdf9e7d252fee73797d7dc832d46a7. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/BED072100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09013aac9d96bbabf8fa8e7b48572a67650eea1be8e9c65bee5796a29134fa8d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BED072200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7b45bd785d4fca04314f0534c278ced07dd08083a26e536dfa327cc2def310. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/BED072200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9780ed93c845870d2dfb73792d8665954c5f0f7fbf6f2e9c3bc3ac6413fc61. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/BED072300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe263ca32ce5aeff4a58491d14bc0f2f825dc6dd50b23516b13438d237061cf8b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/BED072300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1055c38fa32554beac2108915d7e61148af5e2ce55dce2ec2f27733c080cc6d9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BED072300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a43672f2dba5ac1ce2571a1d4e2b228074bc3a3ce8ece90ee3907fd5043585b. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/BED072300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386a7cd744f2455943e8bb812dde6b3db5f3b8029785f3cca54fe3a171d7d537. 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/BED072300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0718fefeb511a0fde358c1f779bbba3f093ab041299da77435a1ce363fb6cd. 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/BED072300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e41d9ead736b7e85e446e64795f5a2a913222425524a3a42dca6e84919867a. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/BED072500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea1c31fc3084982c0f8903f500b80e989ac780cdfe574fa42aeae3b4a5edf3e. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/BED072500004.