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 0xccca52d863b1e5cb5423210c3e7be32e74f65afe69f32cd09577bd1a3e53608d. 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/a8569054-4eaa-4cfa-be30-0cf6c163e18a.json and https://artists.proofprofile.net/proofs/artist/a8569054-4eaa-4cfa-be30-0cf6c163e18a.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 0x3980881154570b745fbe4a6c6bddc8bbc1a6a4919a791a08884eb18e50cf453a. 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/ARF412400254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346f558df2eaf6fb701ba4bc377c81b6a2e9f08a464c165adbb0725000ab3467. 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/ARF411100991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878d8d7eb09d8db0ee2b54acb383b770010ab6feaa261d91adc4281c685e374f. 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/ARF412400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb202b1430d3f2558fd343a3664123a815b2498983d88402b31f49ddc799f1931. 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/ARF412200169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189d1cc5e554255525170d80c368bdcfc69cd6eb7e3214c0e5f18adb28e43dcf. 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/ARF412300308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e6fbd66ad74a49402ccbf657c9aaeda47f60fba00f8c817a80c2550099e837. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ARF410500192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878d8d7eb09d8db0ee2b54acb383b770010ab6feaa261d91adc4281c685e374f. 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/ARF412400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3980881154570b745fbe4a6c6bddc8bbc1a6a4919a791a08884eb18e50cf453a. 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/ARF412400254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f43b4e007a6bb2bc8f60e60c9e5b7fd2156001a69dd752cdd0bdcc40cfb143. 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/ARF412300186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f43b4e007a6bb2bc8f60e60c9e5b7fd2156001a69dd752cdd0bdcc40cfb143. 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/ARF412300186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a10d8c91095198cdb9d9531e4adf268eb4fb7e108324a29bd254be63dc5a332. 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/ARF412000277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c50dd71a9f0ec099f318889facb4cdfda1d03bd16da66a030891fbc75cbf28. 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/ARF412100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e897a13490582732b3ca6b30d0a5a6b960192e2cdf86f329a6865df0f88519. 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/ARF410500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e6fbd66ad74a49402ccbf657c9aaeda47f60fba00f8c817a80c2550099e837. 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/ARF410500192.
Vintage Café - Lounge & Jazz Blends (Special Selection), Vol. 18
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192d79d66a9b12cebdc6503452bfe8138c9082e81127ccfa6aa77a58ec960eea. 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/ARF412000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d2e888753e9ffca14c773847c4e791fec5e3de07802fd2ac964baa5e608c43. 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/ARF412400458.