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 0x1732f8970266b6c0dec45cb9d74dc9d8a56f1341c60b245f9da2d4204d948c44. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29ce0da1-5c5d-4fa5-916b-d75c67e7b28c.json and https://artists.proofprofile.net/proofs/artist/29ce0da1-5c5d-4fa5-916b-d75c67e7b28c.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 0xcfed04aa893eb6783513500d14451442af2d6bb2a7c0d7d8e6b485fd10ba0125. 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/QZNWX2315990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f402d1e41e4b43b653a7b9135ff69eaee1af96199384ce735c70f692127ff9. 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/QZNWX2315993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6c23d56247631ccd9b0fdddda61bc3e5be69f6480fd03c3d0f8f1e2ca74c04. 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/QZNWX2315995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b54f7332e294c2088d4fc2c78f0f7ad90fbbef857f7e9964f97f835ea899973. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZNWX2315989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5d845029a0ce08bdec9db1420b1228d96ef28cac891e5495ef0272695f9eff. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZNWX2315991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243931e766695c86908ee3e354e3ec928aae45006334b78aae6c7a47c9867d52. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZNWX2315992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa32ec6d9c9801768361101839cabb5cade7b2e62de465e2d15355b9e7e0f30. 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/QZNWX2315994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc6825841bd751ecb2be8f1714843a11ff8a49df4742c67a04f469c79274d91. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZNWT2377340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54811bbedf1a912784c2f3b4d2f6fd79c23b50059ff248b8c4e8584da500758c. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZNWX2315996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787df6407430def6c1cad9d1bef5b3ed17ff96d88da9c754f9d569f7091b90cc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZNWX2315997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83045fe87fb7f41c5a5c6df05d181cd042007d18fcfc0fe44373d3e1bb75c13a. 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/QZTAW2454737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebba200faf430547e08819ae56e5c328b838498809a9bbf0459270d5544c66be. 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/QZTAW2454738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b983c103fc305ef2c1e080bf9b249fd432c1ec6edf711826fa47644269a719. 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/QZNWZ2400953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f71da6124174f41178b3b9d54c68f132006b68d02993aafdf19e4809f5ea16d. 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/QZK6K2485223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb775867a363773e0a2c8647366eb74e3a07f22e5ab90d6545dc7733b411223a3. 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/QZDA72211332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcb1750844fc2a7f6ce91710a9a55a17d17867ce38795dbf8355c3ddfe39987. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZDA72211334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0737a908123b4331765e309c1a651ff406b5e2b640caeb385376e3db555033. 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/QZFZ42232456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb126dc2a6579d22c49b5247c2558009246c15cf64c84ff7dbd7db07825eda00b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZDA62497867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7207bad08915d195e03d66607e76441e1e69ac2a1e2be91f9b74f1441df6853b. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZDA62497871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0330f884f84c2c71bc0bdc477f97ae081e62b6e03913ec0c7e84c2d57beaaa. 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/QZTAY2437816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f96073d2690564bfac333d0097b7c4dfc43344dc806f86f25d1397b806151df. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZTAY2437808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a75065dd3d529f5edb765103b69b48b14f5a9ca33ad11546c25a9b4bedf9687. 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/QZTAX2495380.