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 0x92330d8f20c98fd03862d9e40919181827b7b4356b4eb150573d4421781fc2eb. 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/76581da7-2c62-4db3-90d8-aeabb90537df.json and https://artists.proofprofile.net/proofs/artist/76581da7-2c62-4db3-90d8-aeabb90537df.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 0xab3ee0fdffa5f6f4ffbbc94055f6a58f90b8b8f31123ed6126b7ec51d6dc7c1e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES6172424187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe715383642a9f4aaf61ec55a6c9a73c8abd22cd5d229ab5fcb6fa1d415c12f26. 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/ES6172424183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd639e315b0dfc6942bfc33cee0ceb72ab62d6395929707be626633d5dac072a4. 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/ES6172424184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56dde466be2f04dd19923dd656abf221bdd3218d9f9c601ae616491a9a7c2d4. 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/ES6172424185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccce11f207234d8abc31ed57a27ccd4d746b2b1e55e6769811e22dc5ecb5bdda. 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/ES6172424186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3ee0fdffa5f6f4ffbbc94055f6a58f90b8b8f31123ed6126b7ec51d6dc7c1e. 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/ES6172424187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444006dfcecbcc8fe0a2cd43fee1340dff2dc11977b1f990fdc868a992debdfb. 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/ES6172424188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2aa43a0bbd05ba9606cd50d29e29facd81ccc450b7ad5242f76340cee2ad15. 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/ES6172424189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf80cd51aaadf6684389c8234b626ac2e6cc3cf896bb7686b83e048ee1500172. 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/ES6172424190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47584f2be52f73a4a0181e23d9fb917b7018e5597a6d1f1c49d184ac80ffa234. 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/ES6172424191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0141e9f48d9f921cccfc88a3b5846b9b4f5f3ad43937091d30101522714632d7. 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/ES6172424192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43853b0525fdde4a6541784002d6cffa07df3b01a409f4c687077031d1da15d5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES6172424193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9837f357bbf99a79d9119630b59b977f4c7a8885bb6d141013a5a0093a94849. 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/ES6172424194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadec5877035f872210bb972f729262b44a0d78d6347752fe99c876d7239ef566. 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/ES6172424195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ff40af2a4d6b1abbef426be009c64de787ab37376ba63e6cd909b24e208daa. 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/ES6172424196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0caef110c43e591c7c6fea0d00110b0313d08f10f5c0556f376d393ace155c. 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/QZTVM2474916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd318c2b09322ef6906f0a95a44ab0c4d79f5256945e0d9b4200e9c13d15ec4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ESA011807098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af97878944f95bf22f6c6bb37e2b03e8190bc85b6eaab41330c6ce1b84a81c5. 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/ESA011815633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152be3cd32e9b7c99ffcb72074220f85fe1d324c6b7a86e79b3113d23349eda9. 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/QZNJV2460699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152be3cd32e9b7c99ffcb72074220f85fe1d324c6b7a86e79b3113d23349eda9. 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/QZNJV2460699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da1638a103cd394376ca556a0d8cc72d81246dcb136ffff9b3dd8c865e756d9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES64E2508973.