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 0x34e6516d6b0fa27b8c2ab88e5399f392c38e9acd8599024f2934e1136ac08d14. 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/a5e77016-9b0d-4a88-8cd7-76f160f7e3d9.json and https://artists.proofprofile.net/proofs/artist/a5e77016-9b0d-4a88-8cd7-76f160f7e3d9.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 0xc3fa5e845893b935955694fbec8f3bac2b0e97fd60c1d0e0d641716c635ecad5. 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/TCACU1627058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e851f52931f435f6035828d76cfb2aa03a482c99ef43542e6a5086191566c3. 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/TCAEG1937068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19574c26829c7c9708570cd09f14582dfe4d313b4f1c5a6f8a20d06d29e45baa. 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/TCAEK1923775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f75cf442e7d7ea19f31d07b6d682283dbcf7beb1be6d7b2fcaacace0f460bb. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/TCAEP2049661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d12821befcd62aa93cb9e1970226be7cf8d2545d325b034fd2c53e91184fd9. 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/TCAEU2035457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff6fd3bf0b27f284e0e6e2f837e644d41bbaf20898fc70b8380d107811db1b1. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCAFD2024363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4d78a391196631029574e3c773dbd9cb3e9605613efb622dc398d3a20a136d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAFI2012525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81df417de673481f0eb1d3cd8a3d13bf53122e5d7af6b0e0fcd5488f1e999df8. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/UK6KW2100481.
Never Been in Love (First Dance Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0c8543285709a4980aa962af149923261ff7d5da0af6aad0b4611ceaabd49e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCAFQ2193867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f88755bbfcebbd53a49661ea21a187cd701b90bbdff9e296a39daf2483374a6. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QZEQU2140990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbcb14bb264e03892fd2021b6a9fcbd6002a6e638cfb50c37648add77c0dd97. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZEQU2149709.
Never Been in Love (with Chris Ruediger)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cba89d56df52a4c7d4ad55f480eef6818b41388593b61d89703db011584571f. 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/QZEQU2208063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f21b79e1a171679f9822d3bf6921e85368207fa373efd4dcddb7530d9388009. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZEQU2300269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58a7b274c5210b4ad1bf58c5845243d07b23400efa4c304fa4d6867443045e0. 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/QZEQU2300946.
Champagne Problem (Live at Sound Emporium)
Didn't Have to Drink (Live at Sound Emporium)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae5115a77cb3d6a2783c065dcd44c2679f7d51541a2018dbb6671815083141e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZEQU2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d0711679a5c6e01514a662b4cf9d2f9da07c44d44c07732abbff60f8f6a2e0. 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/QZEQU2400263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98312e25a59b17869466b60670cbc640092f43683ff538f387b2d35af6b17767. 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/QZEQU2400741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a92d262c4debdaa141084d6470beac9fa4740981ec84545158fce856a17d4af. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZEQU2401789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14378c3cb0c980d3a9b8f8a7c9e43993995edb8dbf77d38fbb760d192e0cf7f. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZEQU2402195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d0711679a5c6e01514a662b4cf9d2f9da07c44d44c07732abbff60f8f6a2e0. 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/QZEQU2400263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98312e25a59b17869466b60670cbc640092f43683ff538f387b2d35af6b17767. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZEQU2400741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14378c3cb0c980d3a9b8f8a7c9e43993995edb8dbf77d38fbb760d192e0cf7f. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/QZEQU2402195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1218381f5db04f1c14eba1d825776ef891003e4852b90d45ba1a04ef7e30b747. 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/QZEQU2401271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33a36653ef3f7dad160635da76944d4bf58d7d55f996276bac081fdcc42e492. 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/QZEQU2402226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d4ddb78cff9cb6715296ffb8bdba1864345b37c647947babad694e5aec3145. 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/QZEQU2402227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11272811f962934d96cf36ac7bdef9fdf30338e29540288f27f9772f3f53e6c5. 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/QZMEQ2036957.