500 may refer to: 500 (number) 500 BC AD 500 Buildings and places 500 Boylston Street in Boston 500 Brickell in Miami 500 Capitol Mall in Sacramento 500 Fifth Avenue 500 Renaissance Center,
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 0x326402782a7cb8dd70d57f4ba8b0c58fb911bb667a9de1497160cce4658db389. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a67145a5-2736-4227-a752-d1576fbfb14e.json and https://artists.proofprofile.net/proofs/artist/a67145a5-2736-4227-a752-d1576fbfb14e.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 0xb3b736e947d3afbf6d136e9cac9094418445b91848a6642747170f544a7d8cc1. 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/QZTAX2432812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fbccf5e4fd799c6705b67a09bced36e399613e774a6cbd4d8f398ccb1d5f83. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCAIM2499924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1864db11ea5de80543863327fa61c36d4cc60c4c376724d05b861f1aa8c9e021. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TCAIM2499955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f832f11366c182e9a83f81a4127c7464bec36aed7f37ee3c5d960bb3885406c. 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/TCAIM2499973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd2a0f75921ad99bce621fd50761fe20bd437afbf77fe4a019c254a94e08d29. 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/TCAIN2499988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50327c3a56e853595fa0af0fe67b3f6cb1c7b99e0cab33f93593a5abcd73dcbd. 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/TCAIM2499992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ead7bb50ee705d3a3d3ff8f123d2dba7d04c8b82b19d4429379dec4519e18f7. 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/TCAIM2499996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3689058a77c03fba319400b840056e99f9f0ccfe34fff770f8b5545472b42342. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZDA72461515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5523bd13f94ae4b142e6de1c0fbab8e39a610e0c2568682cd2424ec52daf84. 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/QZNWQ2423167.
013/020 (AC The Yard So The Glass Cold) [Year Of The Stimulant]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17548e3471eea5955c43b424bec9d5cffbed035a7f571ab40bd9f9fb5b353740. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/CAHQJ2181394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630903124b6b8813f64d8a95fe76dcf0869931f928bd72aea3fbd3e2acb62a80. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/CAHQJ2165842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d32fe8e95859372327640db60924fb946868adcf43b27a1233726ce93bd1f3. 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/CAHQJ2165839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa541ff87acb15b373bfb02520d2560b04a6cd7e5db39e2e10cddd342568b1b84. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/CAHQJ2165840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fba71e73611b6eeb7b8be13d241624189c2261c5894712f2a3c3ae5a698ba67. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/CAHQJ2165838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aedb976485d5b23ef627e5e5d2babe67e6447ee698b2f4d9e7492f6ab2aa49f. 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/CAHQJ2165837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71acf76d124d521fa7934a5b6896280442538e8cbf84f3f90b5342d2dcc7c37a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ATL810900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fec286783ec7932adeb581fd6cc7d03d00ebf5ea60357f201b2112e27c4eb4b. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/UST8K1768494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56798d2c0379f9933b3b06f6fca3d096f556677ca7609c25da371c4c69314f1. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZWFN2490018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cc407b7f6262d53d88989c6399dad0a178d06532b7bcebdca0343e99272354. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZMEQ2545612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09df6d3077bd9b87f7d571f8bd3e9a0bc07d14b13939e067d9fc8c78d647e2ab. 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/QZNWR2583009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc684de49982022aeafede7d17bbd511067a7835fedb99b8247d026c98d94242. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZMEQ2545615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2936fd086c501152b7af5d8d633d2df7aa800c90f7698f1f038a21d55e21bd. 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/QZNWR2583010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fe0fea76c17ceb9768b9b90f19e37a3104a536d428c6d555ddc5e0bbb1b91c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZMEQ2545618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e278c139c572027c8701804af594e44c37c601d86dfe989c04fda069fac0b8. 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/QZMEQ2545623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0476de98c0fe5174804b01b1eef72a71841fa19dd94575854e509e81b3adbe08. 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/QZFYY2519395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b81a0511f998bb625c62c3f9f7b7e0fa8e98fb60f5be3a1b3504f7f8a36fc61. 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/QZFYY2519398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3859df1eb5483d2ef381cf683079d440580ede448ffd00d0ce4659d81c3bc0de. 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/QZFYY2519399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061407382831af4f9ba3a7d1ca390d8cef1388538ae8ad84ec46bca043f6dee5. 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/QZFYY2519400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a28fd4e4a33084e012e9917db8b53c15bac0b3f7dc154d1b809efa6608e2dd1. 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/QZFYY2519402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01936e438cf72ead81d8bf1938bf0af7242259e6107d63ec9fcb0640ab8466b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZFYY2519405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23734568310f20f369399cff55b3b4f530dad733973086b6a24f0dc33223383. 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/QZRP52523471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46ed3588ccf46ac6e7aac9c810293a712f3525959ac3b77d5e98a6ca5ac45db. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZK6K2568062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65c2ee114b1374b6716fe834a9416ce2c6189f3a483c7450ce30e6bd838bdbd. 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/QZK6K2568064.