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 0xe68eb6280de3788d784f167320b787ffad0c01f4d766f026e6c9c1b6d4a5c1fc. Chain 2 (Bitcoin): anchored in block 953955 (2026-06-16T14:29:53Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/263a8f45-4093-4023-aa54-d345acea3505.json and https://artists.proofprofile.net/proofs/artist/263a8f45-4093-4023-aa54-d345acea3505.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 0x9bf1dd35a11e0d3aa08ef61d37d1d2de222f4cedfcc217faee700d3f8b3eb6de. 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/FR0U91701113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661c6deec84e409d011e7b0b6349ace1c652d098c537b86f32cfb9730aa689f4. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR0U91701114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5f6ac9f30acb2aca6df29e67bbef4b4b053a0fce4691c701cf39a0ad0a453a. 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/FR0U91701115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606456faa953a49a353724790b0db6cb5059a5e67dc739b7d2a0c11616f63e23. 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/FR0U91701116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97595f3cde7c7cc0c36cba631c6578a485321ca4da047ceac6c30d7de3fec440. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR0U91701117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95aac02bffa4900b8caf2dd9ced0285c3a33e84ab2b65e7ffcc1d23a47aa0b9. 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/FR0U91701118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5068573b30eeba901b8cc935b54cd169462c0072c75942b8a69f5a360efed8. 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/FR0U91701121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdf23d6b338e7d81dfd9414166d3a5118ee6e90da217f38703be658578e11da. 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/FR0U91701122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfcc4fa77a284c1993c02c7810dcfa951069210115c51fc176e129226edfa5d. 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/FR0U91701123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a760d302a77a6b0c3b64d5ad81294521a90938de478a895a035edfdd9816aa. 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/FR0U91701124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c077e950f41a0d0299b51e050e0db76d6bae31f36c2ac4643a0de611ee5829a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FR0U91701126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fbaa76265154155734aec3227894aa237bbcf5041e98bd20fae0fd6d70fa4d. 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/FR0U91701127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa1c949988a249cb6e0a4144f4a192dc171e944f2230b9d4a1bd7cbbc116493. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR0U91701128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133e87da158531b672e935b2b9e9a8e8a747b2b056a2768de4f878b3d6fdcf66. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SE6SA2148897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e8a9a628142481654bf90466391d00c3a1d15e34d619769a58911834c48a48. 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/DERX62320103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b80df57579968f4f31beeae31128deec38b3c5e6bf5890eba247af7ca0563b. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/DERX62200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3c7657ef0a33d89a2ced5a9c0f10385d449add57937d1828dda28a0a0980ea. 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/DERX62200702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab6bad132be5056489c236da3b20162d61a07303c6bab1527dd820f688ff1d5. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/SE6SA2194124.
Too Hot Fi Dem / Don't Kill Your Brother RMX
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf699028064d52ea47609d78642fefa3e667f0d8b308f1968e398655d426ad450. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DERX61650301.
Don't Kill Your Brother - Bredrin Records Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d54c9317d8b8aeae30631414cde1f0b14de81d98246b6bf815e8a0665f0913. 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/DERX61650303.