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 0xeeae817d38a71983032113e6728ca9d6c35a0eb13a9a8ce00a5a46a6b41cb06d. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28bea1e2-50ac-4f43-bfbf-bf2197ac9610.json and https://artists.proofprofile.net/proofs/artist/28bea1e2-50ac-4f43-bfbf-bf2197ac9610.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 0x0ff5a75e17c050194312f564bd7c78c63190211535353847b3a8cd2cc28fd174. 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/GBLV62210545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f24aba8060834153ba667652a5ae260962f0920d7170ffb2cc1610c2299c53. 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/GBLV62210546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cbc061296e9e74b4dd408a9fbdf169af39df8c2a33a1ebb24bd9d295f7341e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBLV62210547.
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 0x75b70aa6d99360d5024beb78cc0acb6c4088e444014c855884a33148a45b8ab9. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBLV62210548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423d9e8cc5e6adb5e658e96d7bec978499ce5bbe60780c1cc6a1b05ae3675aa5. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/GBKQU1965750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64aad808f821749b118078dec08d93d5f3c75f0e6f305c7af3a26d0c1859e7c. 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/GBKQU1915329.
Ghosts of Artificial Trees (MarcoSouzaa Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4c25646148a0d0fcfb4fe27e986574c6d8557a77bfba511058d051687f9553. 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/GBKQU1867921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42472ba1b2952a2740abc46578970380868485d1dc29b876fdf165f9730890ef. 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/GBKQU2160822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b8694a9698bf2ac9c603a17483cd45155e8cf58b51029ac2bb364da31a2119. 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/GBKQU2183582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1b58577a94d31878a8a92c222c92d8f4a3d2af3fe260fcabf25e3ac47f3618. 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/GBKQU2113627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0872ce14f0c25020c3e9b67455b612b3143de92d4dd34998073cc7960a6cb71f. 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/GBLV62102070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d171c5635618667b0743875a4a73ba06c79e19340c046a5beac1ee4c77822df. 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/GBKQU2146739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f759d7f7eaf378bf8d719afa0730f1bc7df51e46bb102248c60bcb56096df9. 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/GBKQU2172869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5ffaf98b7ec99a78dcbe0b31105a9b1bee162ad911dd5d8debafcd2a216e34. 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/GBLV62109875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87048f7ba4e6866778f36584efeaec31429aa4ae4b95c25c081d1b2cff9ec81. 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/GBLV62112617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9425bde121ee8c7876ca18389ce187809e0b4bf912bd6b3fd7aaeb0a0d263c50. 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/GBKQU2191355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb368d4e186f71e67072875dc857caf5495cd02302af6ba0b7edaea2bcc54bc4a. 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/GBKQU2196250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99c2908a75450ae70eed4ed53edbc7c9c9aecc821885dbb629de3434dae2bd9. 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/GBKQU2184654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c4bb563aea9ce962b29605584af06de33027a73d81892df846bc8ef18687fc. 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/GBKQU2159941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc9320be5b3350c5e11078dc91ede6d4f8df805cef973041af727ccab414a3f. 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/GBKQU2180992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcaccfa4124f64bc3786a2e1df9e872c23d2b15627b0f6b2ba99dcb5e0428182. 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/GBKQU1986237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58140bda1a9be3d30f4b69d064848d041806a0004b514bdccc3021536ebff2b1. 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/GBKQU2059779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a3331ff688f66e2443799e01ede858985b7129aec28ee065c52a73e5ee18d9. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBLV61915241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb4f2d9feacf7807c2ead05d00e4e70b23c401c33174301f93f188eb4ae7b86. 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/GBKQU2029182.