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 0x8d6cf8122dfe1f4dc7dfb4815f229ef0876919b7526851620bbc61e8f7df1e20. 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/5a074c75-0ec6-4800-90c6-fe911daf20c0.json and https://artists.proofprofile.net/proofs/artist/5a074c75-0ec6-4800-90c6-fe911daf20c0.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 0x21103faded5c82600077008a8b901f4d688501d2d81f17ccd2d7b99243c995d7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GRIE11900067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013efc9dfccf6788310c7a6ff7dc4e559a55209998100c769db022ff45e5b1f6. 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/QZPLR2067101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eed943bfcc243c444d25a5b46632eec9fa1f5b87c901a116ed596b0a144f566. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/GRIE12000126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebfc6c503092f8dd0b42dbcdcbd8f3e382968fbb8f185c82f1bf50159d59193. 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/GRIE12100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c75c505278a0adfdf9c898096e9f05a786e3a7927342e6d37d9c36a654439e. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/GRIE12200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dfd479c9029098f3979a94bfb67f1f4fa101c8d7ed68e236b846754895d0c1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GRIE12200002.
To Poutanaki Sou (Green Was Greener Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9852db4c266a69506a50665a24e26cc6d10d043c26880bdda09f955f43e31a7a. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GRIE12100206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3998851f74a19476ecaa995880565d8d414f19acc63df7ced63555a9c27dced. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/GRIE12100210.
As Tous Skotosoume Olous Ke Metanionoume Istera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcde8e671536fed0b7568ef16dd975d108ab1e2be881e507a8c80ebb5aea74a. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/GRIE12300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952a0924c094074694863c04583db5132ac2898cb5982c532949141fb7129f5e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GRIE12400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902a6a6340cef3bff7c328fdd7238e829952a5e2721f38cd326c058666ed1583. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GRIE12400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b57eff8868e04d39f17b32668fdc095790af4b8f94815544ff7f598b05838c. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/GRIE12400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9a8d0a0f66fa2581bdbabd5c214e69dfee4e607968deb18e32c0fd5389b18f. 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/GRIE12400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1883087388a540693733f78ab3bb87529d0b9496692933dbadc0a6e6468b1826. 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/GRIE12500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd87bd8f7dc928b5b14847a306971daeeb0dcd40ed01d36be37b306fa71ed699. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/GRIE12500069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f05ae6b4a869c8c72cbf2050116134fc24d0b6177e1caae88317d138fbfb949. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GRIE12500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21b726946656d5360d99a1634cc03bd0c98d37e307febc40fc082664f890afb. 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/QZTB32567723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3878a1eb719a0144681d7009bc5945b0ee486a50059e344fbeb6c54029f4577e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTB32567724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37c427ca083aaa4b989f06a8dcd2f5e5c77ef1a10d51d7bc37b509339a81400. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTB32567725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c00360383f982035535d4c931a11f9658a41038ddfc5d6828fbfad6ee473c3. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTB32567726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f68d6b612188186162d26765945fc2bc76fe2231c341b407309f17235d175b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTB32567727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96bc3cf3dd0a099ffd097225b345d7ad3bba890b43d617560f479163d5f22f6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB32567728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e444d4dfdf8ea236d42baa2697d0893af6e2187151ac71d2633707a89deb35. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTB32567729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8e73f1f74ade341ea2e4ea6526da3d85ed18a4c4a858e984526bf256dcc667. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTB32567730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822470b9b901de276da77ce9e744dc5b20e46174ad12f3056f7c7e969fc13279. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTAY2527414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51851a944c02cf3a97be0bf819eb01fc6c649d1b19669f622eb667804e6a012. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTB32567731.