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 0xe81893c05d6111015fd3f7f9cf02d436d74970904ee58e8b6620eb69a7e5bdc1. 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/24448365-cb15-4e18-8d2f-429cc9bacff7.json and https://artists.proofprofile.net/proofs/artist/24448365-cb15-4e18-8d2f-429cc9bacff7.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 0x0c643beff3e08af93d06cfac28405e1245e4ef6291c30d78d66ce80dd83dff4f. 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/TCADZ1800305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be913778bf6d21348f4cc2677a13207850ba9085adda675ce7a2744936e4fda. 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/TCADZ1800325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2825a65895b579d33e439114f61bbd806cf1783f2f2a83147a9f6414a2abbc2f. 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/TCADZ1800351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1a1b59eb82056416c20f383d1baf6cc8482dbb881c9a16e05225db273fd22c. 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/TCADZ1800368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6fd49e5fcb4ba2ef2921c32bd5839c9a8c1a92799567fb489dc0e80dec96df. 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/FR2X41983689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c71419874ebcad441f427386f44fc17e35e38bfad330060e577ec4dd634160. 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/FR2X41983690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3904a1551f26768508e65a4bf8afd0fe611bb2347ebc1df0993606ae92ac2b86. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:23:30Z), 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/FR2X41983691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10c6d7263127ce61013fef07d91ba6a688586c27edb9ea8aaf05f3c26a21ee6. 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/FR2X41983692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0204c8492175a148a7d796271f8bcea0b8180794abe47fe3f77b832af146d6. 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/FR2X41983694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2804edf512387d0ad6d38557de3b6f0bec2111cf2b4247eb65dd7b3f002c7a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR2X41983695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b48cf0ff29080b5c0f8b31451ad19ffb853e9713d573f6fe6c9e789fcea3c06. 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/FR2X41970294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2194dcbe24403563687af6676aa8b307945ffb18bc4c45da70b086589830a7. 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/FR2X41983696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c7bdcd3c9ff7bb78e1221231a504ce9e467dc2dbee1d1dbae9ba5cdf202937. 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/FR2X41983697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2df17599e22aa3a658087ccbd82caf30a81f773d6ff87c96e07d9047980b50. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/TCAEI1907308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f47c88ff9e09a3dec7815204ff89e9e9a88a15b0d7110ccc48b4948ba8201a. 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/TCAEL1916954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bbd30f6f5a96232c43e77617fa5f3cebe5334b0398b7d12ff1a349e2d969cd. 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/TCAEL1916980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938990901972d7024cd3f14e29fb526b3e9e20ce04b3d86a9976d06b341654b7. 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/TCAEL1916996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c85f792be73e43f09106551f51fef84540fa0b666015068791ec657501d8cae. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/DEZC62163295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47df1370ca2c9ebd758ea89cc30c784566abe4796ef7e1a783fd846221dabd82. 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/FR59R1823000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c0a9cff35e9dce1efddeb605554ede3c4a47927094e0d2533397c19b6f5351. 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/TCAEJ1927374.