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 0x3377e121d341f82bc771c33acbb53ba13734b9ba3e6775540c0734a2860c91b9. 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/6de40c81-2b48-4d39-aa6e-9bddc0b6de01.json and https://artists.proofprofile.net/proofs/artist/6de40c81-2b48-4d39-aa6e-9bddc0b6de01.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 0xab8ccd06818a682778aa787d5e2ea2c3f5d3fb97ab5f0a4c2d7a531fbd313cbc. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:22:31Z), 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/UK38H1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdadff9ea91caba0303f8a265873f1cf832d53f82504cca7cb490042be52518. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UK38H1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd990ce9b139d4fba1f85b81535451b0ad9d1975bee2a602a683b31a141e5bfc8. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:02:27Z), 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/UK38H1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1df4820430740b8becf52c0de533baef1a08724b292241e3fed27386d590a2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UK38H1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc48a1860747753e2cb0de0a407320d9169de0d198064b9b2fc9451ce7fa7e4b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/UK38H1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83e527f83e2c87d39efbfe86e25b2f39a04a717d279b2f0962c3c92b7b606bc. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/UK38H1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41fb4258bd5725f5439e6a2a04a99906c0dc4b099291d38f5b4782bad9fce49. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UK38H1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45c3c7998001cf6ed1cf3d9df0217b3bc1c7b06f5bee1351326236652f50171. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UK38H1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3442eb891268ee83dc24a4d196b79d3e64b18ab061a6fbe433cc036a473ef07. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:05:53Z), 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/UK38H2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7343df1b00f4a1f5fd9077d79114ebc46c39e67c0e780472f3cfbcbd5e6273. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/CA5KR2220384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0083f28c3da3e34820640b74e36b30ed59d865444f4d7efea263b77431728b20. 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/UK38H2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ded19317fd3a2e4e0aa7f55dde2cf350792b475126049872934c65495896ce. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UK38H2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6334d5d8f01250b69888f17e1337b7dd44e41de9132034704631b68833e84156. 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/QM6MZ2207374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f63428821c6b61cf9e6b6b340c6f654641cfb15854c543f6ae07871d232dc0. 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/TCAHP2304804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71fc3a0ad054c004f465878d555f6400a133486d63a5d2724ca258c09eb8490. 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/UK38H2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bd366cf85b365992f35d3068fcda0c547bf3cb9ca06ea2efdbea09683857d5. 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/GBRB62100002.