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 0x26ba3a616b4a83b21be40e0084cf69ca9dd4e4682a2f4b9f94ce8f72a87a55b1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebb77cd8-8fc0-48c1-a294-89361a11a8e0.json and https://artists.proofprofile.net/proofs/artist/ebb77cd8-8fc0-48c1-a294-89361a11a8e0.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 0x370703260ad0a731080adb5b1fff09bb89e4a908cc3a5acfa5f40a5656085f95. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2190123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cb628c34eae444b4e46c53c4645f408e8002baad586459b9cdad861a425fde. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBPWR2000061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1beb5eb9b341f7f96f9457de8095702b182846d76e5cc9c421d80a67239289. 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/GBCJY2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe888fa50e0056ba3b7ae7fc6770250011bc7d0072045d79cf4243579c5ebe807. 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/GB6TC2311706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96165a362c80e6a13efa55cdee86370dbd76ceb84948df79bb9d3ae30c12c91. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBCJY1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e77662b0397355d55500eb96f33a1c1f0ae320e4459240b214c4fdd599df6f9. 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/GBRF52100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc454fee7ee31bb4d296454239e4b5d7ab256a2655523a741bd5df31ca829026. 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/CA5KR2192803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe888fa50e0056ba3b7ae7fc6770250011bc7d0072045d79cf4243579c5ebe807. 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/GB6TC2311706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1332c686b30a040a2788a0ef8ff40792a4759631bc86848569fc5a525bf781e4. 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/GBCJY2200345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2581a9fee3f1e15409f5f11081e66eb96409408ae4d63a8dfa7840a0e2a2510. 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/NLCK41050283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2170bbf8e51f7a09fb5fd5e19bf7b5b81662c2f25802a959deef4d0c8d588498. 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/GBCJY2000432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bf5200c055501b26bc9ef224d12049d1b8b4731b24e6d4d805aa8431c3ac08. 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/GBCJY1900157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a3a293ea23de38c5905db4aea724ca31c56e4ebe1ca04d9684e0192c3299a4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBCJY2000399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff1f23d4f8ebfea76e45de337839e9ed8fe6c8d91f754299315568171d1a671. 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/GBCJY2000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c806786ed9808a594dfeef5f5e565eb90b2d145486b92154e0e4a0e89da0bf. 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/GBCJY2100307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528a453c7a2871a8a657d66b0056c94d4bbfadcb32262fec9f16e4aeb9414411. 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/GB6TC2182004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1220eb948ea8cf5acfd2dade3e247da1b4b5a244d341af364277d7f12f8789a8. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:03:31Z), 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/GBCJY2200218.
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