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 0x7088cb44defbb99f6031e206630b2021d404d660918e68f763d123a2875e0f33. 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/3c86d31d-06ba-4d89-9671-41916aba68b2.json and https://artists.proofprofile.net/proofs/artist/3c86d31d-06ba-4d89-9671-41916aba68b2.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 0x0add7cf50f54d6d350ec93e36fa846f069a916fe7823150f239a4df5fb129b0b. 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/DEA669300220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552f7d3b978730f1c2b09bfb7d59ef16551cc8bb4378c86b6c8ebbb33c5a5214. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DEA669202480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79189b56bb04ff0ea25fb132ecbe8cb58b0e86e75b411bc265bc211b5e2a0204. 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/DEA669300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611b32031397ce8fd2105273614d64c93240ede8cc02989e34b8c71f41d40f2a. 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/DEA660500226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f945b7d125afe41458bdba45d1a614a3ae8308f5e4e389928bd9c5d5994433. 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/DEA669300240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f029def6dbdff1fc36d8d8bfa5dc40382aef948c4ca9a8a6f93cf940dd6d3cb. 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/DEA669300250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94495d5604f6c82ed5239cf9a0a25f0ca9e924aeeaa90e0ed130f34994dea0f. 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/DEA669300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef765ee1f5e9c1db64dd34d1525bc1e44b4d52cf7450bb692f6b833e36f1ca8b. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEA669300270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea1b8f5576668f90cfd8be02ed95e1cfb5b556de6572cf59332e80e482934cd. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/DEA660500229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13fc8bb5d0e93e899553319188f2b4c6882a7d1bd33132adf3cbec09cdeb406. 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/DEA669300280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9db7ce8f5599216009b99eb3a7c07d8bb63128861bd7be2efc75bbe094395a8. 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/DEA669300290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05d8d4a6fa7eb324414e74272e034b23c1bd7b668c4916c688f439ed7b95450. 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/DEA669300300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d844d54c367e37834fdf58bb9c8da5b72fbb3ee51231b52f104fea6ea46be5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEA669300310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8413904695b1bcf4c02b9d9db23826c6463902f1753468da21fa47fa80a8329e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEA669300320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30827d794c32d0854662694a275d67b26b95ea2e483d0214e81e7777efc7467f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEA669300380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecede5ee25239d41f05ea337250e11c349888f23e6be43159c3a8824579a2d95. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEA669300390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7accf3deb36f8a112a9b3c42abaf88ff867200b31bf26eb6080cb7da5067945e. 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/DEA660700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99697433786edfad70dc43d9bf917590e78d573981a743e76e5a5173e3a3b7bf. 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/DEA669300410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f628d3dbe8b25cacea7398c8110f0425bd723d248ba36ad6efc2a1473fd79b. 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/DEA669300420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d808403fc902ac0f9b897442095ea17851a5340414b65d90f5b2747a2e71cf. 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/DEA669300450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe6e7d57ced9e67f2f96bfa63809dd64c4c08b0ebf31b5f8ba808d69670fd6d. 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/DEA669300440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7407155fd805c9f63fca3b6670ee6c897afa3e3429d0130ef2b63e12866f40b9. 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/DEA669300430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3580068cf15a360bd90fa7e0454c52a234b0500e5281b4cc4f13c4ad397d7f. 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/DEA669300460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fda3d6d6cedf4e03ebe93a268f5fa214926c79a67da809340a26ed6d7ab5cdd. 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/DEA669300470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0541914e28f56b5235cdecfaa7feb6740cdba8a025d68854bd0f38c4a7bd74f1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEA669300480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b74007f13e2c2fa844727201af41b4ced162c965918dcc5a5a6db84c879c51. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DEA669300490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f16eeca66b1f71306e26dd606844f8b15f4b1fabb64472e47837b542e97a0d. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DEA669300500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3410f5dffea29670c2933fee7e34a19d9f32b58e8afde331e991599918be3e2. 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/DEA669300510.