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 0x9296898a51c8ee83b8ac2876d1d7df2128e955cc31c2b7d6c56d126fd5205158. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5af50d7-1fc2-476e-93e6-de1cc8aaafc9.json and https://artists.proofprofile.net/proofs/artist/d5af50d7-1fc2-476e-93e6-de1cc8aaafc9.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 0xe5bb56560f7d832ce9af23c8245c73502280da0d235878d45f9be017aef79eff. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/AUMEV2257515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb052fd438245d29926d172d637312d24797882dace402d88ba6a1ca87a93f020. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/AUMEV2259498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2923b31a5b92fa1f454790b4c4416d023ff318a1250a5893571767d396411ee. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/AUMEV2268938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a322ac8c5f3cd88aaa1c47af7eb903a9f10904164df4cde7d3691e2c6515f59. 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/AUMEV2271379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f7f33f89c31e6c66c0434e35e38f063e980e3e571f6f404e2ada52f7fad715. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/AUGBT2203616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd0b2c4eac773328eecaf64df5bb1b9da8119ff08c07e98b17dd280d757364c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUGBT2236705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddf13d5207e5273448651c50ec874192dbe81234deaacaa9d78d62bb35656cf. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/AUGBT2241825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30959c28907792c8643100159ed6516c9761159aa3ad175626e3c7815e302d0c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/AUMEV2308398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfea47fef0284427f62a87a27a747241a4942493f3d84bdf9a11589d7b22b50f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUMEV2377573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53336aafecab22b7f250a742441cfb591b3389e051dea297cb29d4e57c1d8a24. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/AUGBT2310397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efe1663c9400e85d63168e44d31fec19834a99de57e9245ab94ff24ee7517b8. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/AUGBT2324076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f003f5432c66aa0aeeeee3706312e7807c3d853beb2947bcab17610acb8859. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/AUGBT2344388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf06aaaae9e2787474bd411c3b8f7cfcbe56959ec289ec01ebabb68ef64eb58c. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/AUGBT2353676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14baece0067d6cf901a0409c1897577110fc942e81d7603c5bd97030d409a7c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUGBT2353670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0358ec91f2bf6365ebb1a4f7f204a10f54d78e57899041197c88cf26a797d8e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/AUMEV2417846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170db9327dd56c7e6a01432d92558522a0fb5da5dd78e45049641ef86fc40a03. 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/AUMEV2424500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441aaeb9ca79ec439667107a5891dbffda3e8c65347d812402ca4a8a92bbbd51. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/ITI2X2401063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46322fb0e54714fadcd4d8530d5c8ae5af0bc72db83a0ac6d1882b6d2f0b00f. 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/ITI2X2401211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ba6c049009d113979532200a3454e870156fe2d529aa28a051347c1c5ba1c1. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ITI2X2401250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9b1d35e310fc6a2cbf0c2019db525fd9d7f49d44065f86c1cce5de296b7997. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ITI2X2401297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2047237ca27de2c4936e9604658e2ccfc55c2d438942b29caeaf2edc33806c. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/ITI2X2401429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1db614ca7c4898f0012557776849a2ba23ca37832ed71660e0f8d1cb4d9641f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ITI2X2401445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5772f870d630852ae45039dc4018520bac10aac39ca2c7db4f7b3fa7c13541. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ITI2X2501087.