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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d469da55dbfed2226b984f19e65db548e586fedfb6f4c635a82431043e9fbc. Chain 2 (Bitcoin): anchored in block 954025 (2026-06-17T00:32:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38cfd513-bf0e-45a3-a6bf-c28f854c2da5.json and https://artists.proofprofile.net/proofs/artist/38cfd513-bf0e-45a3-a6bf-c28f854c2da5.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16e6585921c8c9be6e4e4143aaf7016ee060feacc6bc0d35e5c0068f81feab4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USB961331732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95991dcd5af8b2e7299ebfb25afdd9f8243436ae06ac5149a28b983eae2c6d82. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/USB961331710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa333f28f79a39d9e4a8cbb3b1584e0ca0a36f31f447c6cd95e3acbbf6373f68a. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USB961331720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b72ad590f83c670f9c9adea99787ae1503ba80303cfbeb0f20ac26e7960a679. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/USB961331701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c63e67918273693d0a7dea55aa7beae201c7093d76e7e9f5397d7e89c41a08c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USB961331709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1aba41dc234b64a1186cc0f40350b4f57bd0d10eae3fc0c52833919fdd15cc. 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/USB961331713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c67b6db13dae97af167df2a06b398ec7ae88034042836d7e0d795dbb8f3d40. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USB961331715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2309c3c7ccd124773eabe455c0e4ff295c1cb348f1329e8b31446940d7ff6a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USB961331702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064ecbea27c1803eae8051771eeb57c8f554161c7ba77d9aaaa53347dfdde19f. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USB961331704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74f17e46ccbb4d283896e170fa3a87cbb46855e978b37dbc14abd33f03bb2c4. 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/USB961331707.
"Late for Breakfast, Captain Bachetti..."
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac36edf67d60f5b3865ae78317f12dce79631c3cffb8c3f42afcd1007927792. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USB961331708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed57ffdf90e518605d572da976e7688ed46b95272727c9e899046aa9a4d5e80. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USB961331711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f96e96ab17beec59ba295728e11f293156bc741900fea76f27ee33c85edff2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USB961331712.
Transition ("All the Time I Watched from My Room...")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8a4a3c09828b32c929a2b5cef7cf8dbddaaf6c89d6f0f9aa38ca309b885f31. 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/USB961331714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b4609875862bd379be66e109b8416e82cb3930dc95460fd910096d254c6485. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USB961331716.
"Signora Fosca Has Taken a Turn for the Worse..."
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e81579286688b8e9ba1cfcf04c483334992babb953418d190ca6be07e4962d. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USB961331718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3262dd0860dd1fcc0936581ede99d4897ce089135c282739d5e64a47b6dfc7fb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USB961331719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7499b3cf9ba5453b232bc306d07ca68e9d9505383911f30cae37ba91f3a2d93a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USB961331722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8b0db96bc1544785c4dcba967ae3f463c9046f4c8ca72bb70ba940cfea61e7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USB961331723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec21ba70f6283b537cf87fdf654a9bf8fd429f9acc76308f7f674ee16cd8562b. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USB961331724.