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 0xb6d811c4fc7695f1efab37df2cb3585932c2b82871c0d757b54afafc307f9287. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6cc0a56c-c22a-44bd-8648-fe5c675fe2e8.json and https://artists.proofprofile.net/proofs/artist/6cc0a56c-c22a-44bd-8648-fe5c675fe2e8.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 0x1d77cb44f06bb6cb3f815f85551051ff1ab912b61c2b1ee347a4ade38c4e58d2. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:56:56Z), 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/GXBAV2185881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a3afa0722fe46acba149cb996a7b85d6d7d7e0d1714bc1aecab7912046706c. 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/GXBAV2159633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1672e886bd5f6ac3eaa3097b6307600ca2391e788a037f029b81460503ed54c1. 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/GXBAV2124000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3478809cac8f30c0d2eb778c6edcd5a8a1f42c40b253f4550b2412c81a15754. 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/GXBAV2148430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fbca296f94ec7769ce2c74857452591db52161b409e3a4952d30be318ae4f9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GXBAV2198644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4bcf9909ac90b7a085e34c584ccbc11fe338703809b80ef1a983f5e3043a3b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GXBAV2115317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4391a829d34cf9bb69766ab8a946fd07582346f9a75b5d6d8d00266a10dc34. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/GXBAV2129757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb376331d67c3f96eff4e1967054ce6f0fbaef3dee4ca58d84563a78714c2606b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GXBAV2128140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d77cb44f06bb6cb3f815f85551051ff1ab912b61c2b1ee347a4ade38c4e58d2. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GXBAV2185881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965d45979e8c776c03d39f12df13da71dff64efe68a005a59bbfd0f5fc654693. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXBAV2138406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8b4157bbf93fbb9392a11c1788c55398725c2ea6d6a2b9184cb61141463a21. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GXBAV2151483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5db39c9b208d76d7d35a16a9bb15c67c8e1db4b7706c4f35a8171430b3b507c. 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/GXBAV2190064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d0e0ab1247dad14b8fdacb119e2b4f3b9af1c33191cf1f0140a7ace10f3814. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GXBAV2176856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3a90a189ce4872ccf668c8bf6249dc8df1576c673b56c2c39b00f432bd424c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GXBAV2148175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093e2578219eea6b0668505f36d5dc4386875eb1706642dc7cf2814cec7f22f5. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:04:31Z), 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/GXBAV2124680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36adda1f50ee6cc97e1db635dbcf4e9ffb2cdba71525c7f71f065c63054346b1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT5M32517131.