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 0x26ab7dc670c83e4f7745873a2245ba7abfd4ffe8c305071f3fb1efd0cb67de50. 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/7480ee17-6425-4b16-9a5f-62e75f9c7682.json and https://artists.proofprofile.net/proofs/artist/7480ee17-6425-4b16-9a5f-62e75f9c7682.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 0x208b41faa13089667769920e99a890e6ebc230279b0d6177190e625e0697414f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USHM81777827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b45cd0a5bedc22f171d46ef8436332f8492277fa259af748a722d75e84b66d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USL4Q1816739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771fde4df7ecc98a6ae12ac816ac78fd3deec2f0102104e1e8fabae7d35a3786. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USL4Q1816740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb996aed7c5b8abdadd03689f82f23fcf251395ab5e48f4fa8ca470b8991bf4. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/USL4Q1816742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d4bbbf6c5f8b7886476809cb68103bba6666db85a6f91fbcb2b2ada503a9a5. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USHM22109903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc35230778bcf23561abd3bd42bde86d4d591c055955fdee57869f3537664e1. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USL4Q1906875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd1f3f37cf64c204eb974256feae374ee0debb1fb87a1d172565e48bca8e976. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCGJ2068349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc493155f8d500b0ddb1d149f8a0ed2c998876d8c02ef8d77c6f321a27f8a8265. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGH2015223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f9c08cbdded1e03f589ee310229c0d8a74a558e6a202508014793d373684a4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USCGJ2068350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd459070973476a44063c03422238661fa360bbfeb17a06b77bf74ccc6a5408c1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USL4Q2173964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f15b4168e735b5f707acd2d08558fb2d3c1b2e665fe6c335ef629701a844c7. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:38:47Z), 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/USL4Q2351034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04fed2dbb56bb30e71b217960075cfe0b1ae52ed7073342d758f9244f6f7a38. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USL4Q2489952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c56b42756b1f6522365e3a9d37481c19b7908667884551a53f351c33a01a617. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USL4R2447429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d4bbbf6c5f8b7886476809cb68103bba6666db85a6f91fbcb2b2ada503a9a5. 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/USHM22109903.
Autumn Chill, Moody Indie Folk Songs Vol. 2 (Indie Folk Central)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04fed2dbb56bb30e71b217960075cfe0b1ae52ed7073342d758f9244f6f7a38. 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/USL4Q2489952.