thumb|upright|Sohrab and Rostam fighting: from "The Shahnama of Shah Tahmasp" ( 1522) Rostam or Rustam ( ) is an Iranian legendary hero in Iranian mythology and historical tradition. Being the son of
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf15993bf66951b758564e72119f2991e508b8adb159b1ab73c019c6996ac2b. 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/481184f8-d86d-4a2a-a8e1-30ba9f8dcca3.json and https://artists.proofprofile.net/proofs/artist/481184f8-d86d-4a2a-a8e1-30ba9f8dcca3.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b334b64ec8fb343c604ca5ab418bdda02d9691f1ea1793b3ba678b7ed88641. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBBKS1600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3745765e3aca48af9302d597a91449be3f518a5e649a6658da3adbc862a31c3b. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/USNO11700277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6c319b86dec8db000d4c378db6ddc5678872ab8ec6991e71fa4fbed40178e3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USNO11700278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025f3cbccadb1b13e6694d9dd3099ead313817812c46e664eb9e20b4587c2d98. 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/USNO11700279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24e352b784b8cae133a880a00f6546b3a5a9fdd6c87af32744a02031ea10151. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USNO11700281.
Fairytale of New York - Recorded at Spotify Studios NYC
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cbebd6bff9bd06ca0e8ca62ec8cc6b14b4c21d3fdc30c662c0bdae9d0ee5fa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USNO11700794.
Bike Dream - Recorded at Spotify Studios NYC
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8165bf89fc6b5ae817a8ccc160cd2698b2eee286b1f8ac853336a0c0918f94. 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/USNO11800101.
Pink Moon - Recorded at Spotify Studios NYC
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767deaf5e76f52d8d8f73f3e0a99fd8bae0236c370b6ab8cb4b5c789569c83bc. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USNO11700952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380b4e4fb21d40c90e92224c7059ced7c8bc3d4b7654cad3f2c98559b93e4a18. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USNO11800368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70670a5e8beff2e8d052c7c2a46771613b91df525b4caf09114070b2911842b5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:45:37Z), 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/USNO11800369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbc4713a2688492142c8a15f8752607732997c0fe4dd7423f11fb538290b70f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USNO12000309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1138ce41be515412eea445aa25280fdab87474ab2829eb8011f98144986c37. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:21:52Z), 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/QMB622000405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6b3578e9c07684a7affee1c8f3cb9cc08b2400d4c325ee2e8d162231a79087. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMB622000406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0faa54ff2e9b7690715e655f76742cde6cb392c68c385cd29f0870508c0d8fe. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:31:57Z), 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/QMB622000407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2344771a85ec7cb4aee4d401bc3da2932b9ddc24598a2bea8dc95e6c410c6a84. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMB622000409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb673cea3838dd8bf67291686f03ca7f7b630c85382310e4442af8e01d6a852e0. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:48:57Z), 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/QMB622000410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dd2bd5a0433f2e976fe3caa990a914aa6910b7271ba03b0045c40a346db787. 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/QMB622000411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa053fcd5174581fb4d9d0a6435a8689b7e3f2c9c2d7c641196fbe01fba546b14. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:13:11Z), 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/QMB622000414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbe53f00fc37185d8c011ec91abc75a5e6b8c299181cf62ac9bcb577bbf8e38. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMB622000415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106c160bb518cb43a032e3558bddf24a3aae2a98ac783541b7bdf80e73952bdc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMB622150001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9e9d48fdd57848ec97d685eb7dc7720c3df1d2f6abe9b5391bda6fb9f96a8b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QMB622150002.
These Kids We Knew - Japanese Wallpaper Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597634580d518a6fbe07355ac401f147906087d36d397756b53e4f47cff1cb94. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMB622150007.
From the Back of a Cab - Ben Böhmer Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74465bfc6a36e4713a4b867f1693f93e82eb5e4040c56693ebf7d7fc6722e582. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMB622150008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2c93168cb502e12e0ef9037c11480b77f95e8112f820eb3936ffc95d6e9418. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMB622150009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9727aa4cbdfb48480345edadc9310fa40939927ab1c854e7844bb5a4c58f665. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QMB622150006.
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 0x5ed75fa60948e76f067962ab9cf57b19517f4d617058a53d647cf18fc42cc740. 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/QMB622150005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63d340a5b0e988b278ab14ec36f91d140aaf0d284e7ab8901958e58dc76c2d3. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QMB622150003.
From the Back of a Cab - Billy Lemos Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47b99da98e4cf88f9e12255e24fc05ed25a0d657cb92ccebdcd77ae9504f8f9. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QMB622150004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1041bff17903a93ab4658e4f12b664b30f92e3575082635cf16bd8d9812c5ed. 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/QMB622400824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b407084d1eb0f87cd64ba267167f206c394cc60ac3364deb52bca23965e5822. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USBS51500123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c24f457ba85170741848294048db3bd1b75766d57cb7f31cc0320fa7674db6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USBS51500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efb0b38ebd10fecc4c490bc3457933a22c601c96a31cd09b8fd2c06131e8d87. 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/USC4R1802423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b407084d1eb0f87cd64ba267167f206c394cc60ac3364deb52bca23965e5822. 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/USBS51500123.
This Song - Lindstrom & Prins Thomas Remix
This Song (Lindstrom & Prins Thomas Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5192163e1dc02b1add21d6494fc363267e9b6e874ab69bd6aec22280c3899a4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBCFB1700103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09425db150ddb90009bdeb2b87a05b0dfc92440f517a8d793bb44812af7f2c9f. 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/GBKPL2156612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31d4396a0c68f52a7438856700e897595e0891651171976153885faabaf746c. 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/GBCFB1700090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc38fcb95fb9266f4fc89ac579f7fc12c1c5ca82fb465f8cb3b580dcf79bc45e. 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/GBCEL1800096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d059f2a72f70a54152d2a1fce976603c576869976eb230bb71ed4ff02c18e6. 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/JPJ902110790.