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 0xc78a2b4eb0abc83582380f449dc1f1bd5e0e8a05c04c810932f3bbd81f728af6. 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/71ea55d5-0f73-4842-a732-7edcbacc84fb.json and https://artists.proofprofile.net/proofs/artist/71ea55d5-0f73-4842-a732-7edcbacc84fb.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 0x77da79d0026a146f772b1e6c39cf3c10557dad7ab2f6560b0dd803a1aab2300b. 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/NLG661300269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b93c36033cb58e33a1d72be516095c6a73790ee5bc500c72d62fb3ac80d50f. 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/NLG661300270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bf2d3209251325b5260a8ef9a3355b1deff8550322a345add1c21b0e02de8b. 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/NLG661300271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc759b22193c210bda0c8f866aaadd9ad154826bf46480b779307594ec7d74eec. 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/NLG661300272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb737c929a097548b24cab865e12cfee903e219daa5cc96bad820319f43bf3a. 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/NLG661300273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446eae784babeffa67a4e28c1cf0235f6c9be333ce605a6896546217fb31e2a5. 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/NLG661300274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914e4dce5feac878a8a8305056fa19eecea80c9036d5e2de699acdeb1f0899ea. 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/NLG661300275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda24d967fd466473bf99d7ecac9a33157b97e6c4aa2c9b3a42518a895222a236. 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/NLG661300276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e678d884efec667ddf2c72bb18a73217f5802a733240852ba68ab2b3580ab1b. 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/NLG661300277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1f19cd511a338c357ddd4f6e5c3c4132cd94f90c7240f7fd8d50a1ab07c8ca. 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/NLG661300278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ec2174e4352f02b2e65188898531d0fdb435c40c0a697bed0b19a6da86975d. 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/NLG661300279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701b86f78d1e97e33002d9ea91f23bd20a4e212c2468a1af6aa170f7365ec5af. 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/NLG661300280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f92cd8a1e87a45e2df8d412d63bf8001138806a64c1a21fd000a8f472ad4a5f. 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/NLG661300281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedfe9e24d664de4a72a73358cc17e23f39f563f0048cd8f5745fb9fee5bd3ad. 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/QM6P42558933.