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 0xe8dbaf8b55a7064733895ef552579062b4a71f337b12a5b00ec7420ed9f6c067. 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/0629928c-adaa-416c-8899-c1e0997cb058.json and https://artists.proofprofile.net/proofs/artist/0629928c-adaa-416c-8899-c1e0997cb058.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bottom Of The Thames (Sharks in the Water)
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 0x94be1f6d99d877b69f51b1fb798d9fe86605b91135d1cfc56f4a648d781112c1. 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/GX3Q92355518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c7b0857dd0fecaf12502c2755f5ef6a7ea9f242e4a2d550a9ab4467e00212e. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GBLFP2319541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbd86d9388cf7ad2b5050377d865bd8455aae7eaec67b4e7634c99b16c6e3c3. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/GBLFP2371876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f3f29be8864f1a9dd98fc38c01891180c06c99ec3751986638d8108fbae16b. 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/GX3Q92401353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe595c2e9369d9ce94c6c5daf7298639572ef0001270715814e7282f2332f96ed. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX3Q92468391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d171b85276a00f0bc3aa6d1c826882135b32f7472412edebc79b54332aa9326. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/GBMA22410531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f074a04cb65791078606619128463cc8b280b815c1b5b4c147186b4f00a683c. 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/GX3Q92096225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6da96014f918f2447157620cdc580b09686c3bfbdee306ee94e01b99bc3694d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GX3Q92096226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa74b51daa637006dfa7764e62935c1d5be17e5bcf8b6c1e1a411d112572866. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GX3Q92096227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41842195513f2f0afd7e9f2d2cfae891bbef95671ebd171f21034a6b26496aae. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GX3Q92096229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0431de4f3c0be8ba6c66dcd2d0d867feb32837b30c8fc10a1b2e85b54141607d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX3Q92096230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebf502d87cff34b234895be60ad6379a4f1e9b1a55b8f44601acb0450d149de. 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/GX3Q92096232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b89659a4539fb7f7730a6516074372a4c71176754df0a4b77ca3d7624724dd6. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GX3Q92096233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3253f2436d40572ef7cef3d540d9264b092821c738098c698a0c52d32bc8d0. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/GX3Q92096234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c662da151586008c11247166220c86f780f538248bcad4e0dc635d4e7ffea3e. 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/GBMA22460814.