Roger Keith "Syd" Barrett (6 January 1946 – 7 July 2006) was an English singer, guitarist and songwriter who co-founded the rock band Pink Floyd in 1965. Until his departure in 1968, he was Pink Floyd
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 0x3dee794d253761f7e7c6ecf5481fd91807efc580ac5896e3645c9547d476ae77. 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/1889b95c-d25f-45d3-afba-5dddb6e9536f.json and https://artists.proofprofile.net/proofs/artist/1889b95c-d25f-45d3-afba-5dddb6e9536f.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 0x1f05a3ad5f5143c7799973699c41b879673bef02cb463f401dee2ed39adc4bcb. 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/GBAYE7000307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7006520a8a04b2ba9a7c55ad09e048c4ecc67882fae00569d7301d36a6debc. 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/GBAYE7000309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e4605246a91c5e7b1f3c7d75681f0d0a24bfa0603d409231c065c6e14bce05. 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/GBAYE7000385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6e907d68b5d1f5985f7079da1891c8c8f324741a757c8da35dd0aa5f82a0b7. 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/GBAYE7000194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99ed3bbd96d2a2c0089f0d105db3666f8316078ed668ffb1586e5c7506f1ee6. 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/GBAYE7000484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02ec03a505dc7e6d8e309c56e474e965dd8186a1857d60eb84b15bce6a26f06. 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/GBAYE7000485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812619f524cdc02eb7c318d925dbe93fd5b6d0506eec9eb01dddff333393b27a. 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/GBAYE7000486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a97a4bba9851f98b9ed79decb8ff41e3d4885696aed03994351b9b1679e7ed6. 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/GBAYE7000173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648fb5195773148ce821fd5db7be5a26b107bd28f17fd3232787576967ddb614. 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/GBAYE7000308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d18ae7ceffcd2329d95b4c3c099e6672fc96626fa87352f59e6fe003d79912. 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/GBAYE7000487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d828716e2633f35917d085abaae5bedfe89dbb950c551cafe8bdac32e80505. 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/GBAYE7000488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9293e8cdd0c6a0207b8ff37bdfb9273b48a4814bab22681202df6f8e8fe4c903. 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/GBAYE7000489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4735a4e09ae453f3968a6cd8cfb76b9e67eb977bcdfdb799ff95543b91371063. 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/GBAYE7000306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce6020e95ea60ed008121be9018c9597f63be4ca198c8e6796d20b0a8e5d5f7. 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/GBAYE9300629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dac0e885f3f8dd8e52c41f0ade86c6799ab325b242909907c685461604173d4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBAYE7000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1167904c9776f89f6456d9ae377b0550dd63a4429a7a9a99f1b7b9ffbb146b37. 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/GBAYE7000053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78093b0b304f95769f31a3b817e2910a8aa82e584847f7a94fa083feab9e2b97. 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/GBAYE7000054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a45465dcc01a3f1e421ad7272f58838b3407925b22d220aab37da364fa3bee. 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/GBAYE7000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd377772068fbc3f8b15cb0923ab594b038decc3e13ce2d12190ec1f223f83f58. 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/GBAYE7000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d09df28f024ec512a81c7a6c925b5d6d3cb65587703a21df307fb891a19c348. 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/GBAYE7000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f6eba671b347630778c5a7ec6a952d350c15b7f4557a03568692a2bfc0a9b0. 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/GBAYE7000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbb556dc633315fd8f9dc45dea884a0ca79daa6740aac8453b4f8bc6220bca6. 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/GBAYE7000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff55ec39b6f9bb586d4e3f1ab3f3b69446e3af9bb6df6f5931bf7e19ca403451. 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/GBAYE7000490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2999e083a69870e226433d01ae094e94738437eacde1a9a8076ab3180070b057. 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/GBAYE7000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eb9d326d14d9fa643b6fc3e6bd022401a7e2d3b88027c75f8e3e3e63c2b0db. 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/GBAYE7000061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0b808164341de2055785567db5a3537238729d364cfb8ae636858bd45099b1. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBAYE7000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff3886912b60a79ad56e72580210c7d308afbd02833e594feecb63c9ea316d9. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBAYE9300820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622e2b65fe1d0ae9b8bf036a3a805915297dcc1cada4b91be1bf7b72327724c5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBAYE9300637.
See Emily Play (Arr. for Voice, Saxophone and Orchestra by David le Page)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc815c5b584cc63d31535d5baadc14b62ddacf0a7b65517e2202b6633bff53fde. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBLLH2284004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691f55ee0550bd6f0fd3d11bc9c151a4d10498b20d796d5a17b6ee5fa309f42a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:21:06Z), 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/GB01A1000281.