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 0x6bc407bf89d76f7fdcb3e874dae9ad764c5f9be3ddacb919c570ded774f7f170. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73a2503d-0761-402b-bfa9-d0dff2c226ea.json and https://artists.proofprofile.net/proofs/artist/73a2503d-0761-402b-bfa9-d0dff2c226ea.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 0x8300adf8b980b7fc53bf49b01a306b10431f09581df4eadb432f3676acb53abd. 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/SE5751935657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76bc0d9f91da54361a3b08660ccd06d632bdfc661a5a313d414cb37dc0d9447. 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/GBMJG1717294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d591211669914128b07e9791aadd2b6c7653d2feddd1d0dbe8af7b9769f4f18. 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/SE5751935658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5230360d03379a205d3ec351bfd016676d9e0211e943aaeb44ef6bac5f0885. 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/GBMJG1816498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f5c3a4bef50706934a7299122442249347048048da2387773ea0c9289d0866. 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/SE5751902650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae5bdc24a18cf9651471d4b39cc24a4cef54c1cf672c5691785b32588739e9b. 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/SE5751935659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41cc7b81553a53a15d5a15e4a63b9bb1b3bb9f3aa7c2f5f9cba30563007603f. 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/GBMJG1802724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95849a1e70d4b54d560fdcce5ce9ce6ff758084eec2e4ebe7b341792d2710b1d. 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/GBMJG1719849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74936702f15b5e9db8e0320313eab6dd0a186d33dc731178d0e5417ede577fe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:25:21Z), 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/SE5751935660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d0e0c2779e7d0b05f109e55dace82c9d9c99b1bfb6aaff3312c0bff2755fce. 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/QMBZ92395285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe22de60ca2e9e8fa0b75b8d94d4156b03543ec2ebc0cfad001ef6b815ce4e56. 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/QM6P42302109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde80ce1a3603dc803f1fc0a7b669ccad791e61f78a30625482ad182128cc86cd. 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/QMFME2322682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f0a79457897a91e64341c3256ffea968dfcb2f96b20a79fa7d5a23ea7024e2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:55:46Z), 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/QMFME2322660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d0e0c2779e7d0b05f109e55dace82c9d9c99b1bfb6aaff3312c0bff2755fce. 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/QMBZ92395285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe22de60ca2e9e8fa0b75b8d94d4156b03543ec2ebc0cfad001ef6b815ce4e56. 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/QM6P42302109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc65e6599f43a7fcc493981668ea002dae832878d4c884eb365e3cb6601f12d. 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/SE6MP2200702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac001c9038ac5ecfbcccbc208ef3b4c2e3a951066de94b1c8fba50801ae29fc2. 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/SE6MP2101201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1caa08d62806b3de7b423482dacc531f50b8cff6f8cf303eafe77538a873bb. 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/SE6MP2101202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7b9814dfb3a797c17822f6fe7e03185890bfdc0da62fe45935e21804bbb3bf. 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/SE6MP2101203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00b59b3ba1c4c7f99ef93344b61a29ae9be210576829637a2e2c2f6fe7e4df9. 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/SE6MP2101204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1caa08d62806b3de7b423482dacc531f50b8cff6f8cf303eafe77538a873bb. 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/SE6MP2101202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f5c3a4bef50706934a7299122442249347048048da2387773ea0c9289d0866. 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/SE5751902650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5230360d03379a205d3ec351bfd016676d9e0211e943aaeb44ef6bac5f0885. 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/GBMJG1816498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41cc7b81553a53a15d5a15e4a63b9bb1b3bb9f3aa7c2f5f9cba30563007603f. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/GBMJG1802724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95849a1e70d4b54d560fdcce5ce9ce6ff758084eec2e4ebe7b341792d2710b1d. 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/GBMJG1719849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76bc0d9f91da54361a3b08660ccd06d632bdfc661a5a313d414cb37dc0d9447. 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/GBMJG1717294.