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 0xb0b2d095dacc260800d2c3044531caab167e2c0c205059886fc4a4962d6b6f31. 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/99f814b4-78d4-465b-95a0-d357155b0a32.json and https://artists.proofprofile.net/proofs/artist/99f814b4-78d4-465b-95a0-d357155b0a32.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 0x5e703447235dafedc29654980b96a55c21ba85ba29e4bd64dc0b68bb55673bd3. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ATUM72300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ac1e53802ad337c3c9c98855c809b2c126235a47d9a186dafac6fabe684446. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/ATUM72300256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085e2ef5efa76fc632ce7d6207f5070eb2c6d0e7db22efe98452d9b2f28c14f9. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/ATUM72300257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61f0ba3d3a7339d5461bd80e61c778aa4cd314d234d57b443fb95c48f432d5f. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZMEM2349963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4724fa0c6069f168a5dac4e74e4a13493554a93b40531dc22873dbcad02abb83. 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/GX3HH2388164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3730acabf9b618cd1c58957b9e01e7e93d95487ed9cba6c41549adba5eebf510. 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/QM3DF2225564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90302c28b0d8bcba6c7c9531720cc17414e5c22f82d3c76c7fe1afd2c84645e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/ATUM72300488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90302c28b0d8bcba6c7c9531720cc17414e5c22f82d3c76c7fe1afd2c84645e. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/ATUM72300488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ee5fd694d42b37bd57ff9c4bb48874a3da8cb27a85da19aaccc38d7dcd23e7. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/UKZGC2308132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64cb340b35bc5e6f974a2cf3d2d7cf00dbbbba9e7850b1a73e44b9947931ef6. 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/UKZGC2402048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf70ce4eec0c16fca10a2c04a5d10769ce43bd91f381feabb4460075e713897. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/NL4WT2400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c9ed0b6f333e3357863ece056b0d45b5894af3241bb4df47680898d36c6172. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/US3DF2435447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab079a290c1f2c6ddf1d0d09179bdb3f799c88c91c1ab6d2d07bdafec2a62ea. 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/US3DF2423110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5937c375eebcbc01b57be7dcff3ba1e7a4a663c97060a0c400abbb817d78ca0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEH742426094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0f401d83cfd4cf5d0ab558c72deefe81cbf25ebd7c5b476f147d7d7ace8f60. 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/DEH742426095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfc76f179e5c8e58b54a621bca2c62bfa859ce1f9b494b070e7cec2e9b2d203. 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/CH7812414089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f5912cc3f5e385c4bb2d2e6304cc92364b0db561ed3299fa26b2f0ec87aabb. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USANG2403538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69faaa78f48c7327ba5e1466bf3ea7d06f4c051210da6af5a844e3f58fcdbcc5. 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/USANG2411652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f76c77410700ce6db18d91a276cf6548d1ead22d658125e248f2208fe9de038. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USANG2462468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5291f21c8ce489681003730eee8018a6ad3d2e100f2902702406c45eafe46158. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DGA0Q2437102.
I Remember The Time We Spent In The Summercamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd5a3a2499d9f83e1b6a2721fa1b6c5df48145360bc37d531d6b6bf13c0cb55. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/DEZC62468122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa1d3def2af5974b46d777165e500c2ab575b7fa0e37796f402017e6fab836d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/US3DF2515553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9185d7d143371d5a12724dbf78b3e0e8f219551074b3e5c9e9834de9aadf81f2. 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/ATJJ52500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b153ea4562516410ac93d6de9deb0e22c2046e159c511e3c089c0171da8f3e6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/ATJJ52500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c3c6157e59b7b4cfbbda9d16df260715aaf88e6d8df0eaad2dbae64b12d0a0. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/US3DF2571813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2858ff48b50973cbaaf16bfaceea712a18c39a22a068ff40da00ca3533db396b. 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/CH7812541299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf27fe59f8cb3b55f11435b6b28b1b22e2228fdb1eb8563998c061c340593b8e. 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/US3DF2582359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a84adbb55f773eba3f42931c830b98eae4ae4d6a700c114f4f90626fa5b83ca. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ATJJ52500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcf27ef8128e4695282db04ac2e544eac2b9e90f39096efed1692daef981acb. 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/QM3DF2280680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6db39c027cc1af574009e3397995aa51827a6e7d189178bc0cc751ffbfb7936. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/UKZGC2400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97be45fb99df7c14216606a4fde7986e493752a5866e67d391fbd49381dfd57. 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/UKZGC2408742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fab21ec3b1ad33dcf0bd575a53f4e38b051d7b3ae8230e2108e95fcab6cf2a. 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/USANG2481760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1b25cab877970b73d2dc7a6f3a4b5dfed524853463b3b5d0ae23a10c3172c9. 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/US3DF2568629.