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 0x52b0ee95a1bf09bc65ba6688a02b9826ae37eb4d8c5e0797b5bea80cf4dbbdd2. 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/eba0ddb8-850b-4e2c-a481-6a534ded788d.json and https://artists.proofprofile.net/proofs/artist/eba0ddb8-850b-4e2c-a481-6a534ded788d.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 0x42f8cb86365feb3ae7c9dda9cbd31e0b07fef1cf59af0794eb830db61935712c. 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/TWF710900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923f3f65df6315c2d474c9f2771a6a8848c10f5eae7ab4b003484562c07e02cd. 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/TWF710900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f1d5d6c36d4954f31834b32502e87753928938b45c0166019cc6c7bd882c74. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWF710900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04b8ace6a96c9275758a00656449c80d348478239a10f1a6ffe7536654534f4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWF710900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8457c969f0f41c08c54560acf7fce3b0931af4151a6311a7bdb92fecb9544cd2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWF710900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec58c115da607f88e44e8830d379eb025d94ee392567a489566e28a1126575f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWUM71000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d02a5b39612c374c5c2eaeecc8cc65ad93f77333ba9d6860e917a740aa2258e. 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/TWUM71000093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2747b04f9374e7f05a5c98ce035b656aa96b88c39765631866af3f7a07dac90d. 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/TWUM71000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9aea2e62662ca93b966af9a3ce81ce76e6ac71c18fe42777a3bcb91dbf4716e. 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/TWUM71000096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5beeca097b8de8085148e7ed0edfdbe1dba38e919c3eec0853bfb1bbb5a9d2c. 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/HKUM71500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9aea2e62662ca93b966af9a3ce81ce76e6ac71c18fe42777a3bcb91dbf4716e. 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/TWUM71000096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec58c115da607f88e44e8830d379eb025d94ee392567a489566e28a1126575f. 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/TWUM71000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07232c79183b4e5f06e0f8bbe7595a6b3c4f6a9488b35be249992e071212e14e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TWUM71100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfab0138148dea4da214cad1d9494cb61a9812fd50e35d3391b4a9d066edf98. 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/TWUM71300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa088cfc5d53bf20806febd9c31585f9c4c791d266fb13c813f4de469b8027be. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TWUM71300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391a8c50bd0dad941b4c836e6cf06c026dab47fb3342484108f2ca393b292718. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TWUM71500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51594aefae864c167b7f77215c55cdeb330974861d77bff3fc12865aefa41db2. 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/TWUM71500073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07232c79183b4e5f06e0f8bbe7595a6b3c4f6a9488b35be249992e071212e14e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWUM71100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588817ce92add649d51ac017e808630ea1a8f73714ad95f6492f78ecd7af200e. 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/TWUM71100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cac1311e56f316975601f14abd711c1db7614387433e89f495d60e90bb1e81c. 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/TWUM71100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa088cfc5d53bf20806febd9c31585f9c4c791d266fb13c813f4de469b8027be. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWUM71300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5ee728ff4f0873a8af59a4de319f3d8af82e9929adae5d167a061b1ce386ae. 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/TWUM71300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cdd886cd81cf5bf75f8c0d99e24293433c2bce33eb2b7037486a57707d7fae. 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/TWUM71300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa834ef19e918558b5c97805cf773e45cec4d76eeb17fe95237ee15249abc5a2a. 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/TWUM71300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfab0138148dea4da214cad1d9494cb61a9812fd50e35d3391b4a9d066edf98. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWUM71300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f680e28b4ee229690bebd428c7611fb5984939b14f770f02a56e68197738e9a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWUM71300054.