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 0x75f5cc94c97493acfa6baa90a2b60fe03f169363fc386f01ed5e9b16ce143d69. 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/d41ca3e8-c58c-412a-8575-0a197b05259d.json and https://artists.proofprofile.net/proofs/artist/d41ca3e8-c58c-412a-8575-0a197b05259d.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 0x4c2b2d13bcab329306f1797f83771c9f349e08c21588ce3c63beedf3e15d751e. 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/SE6XY2208215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a39a3fc83e82adb04afbd4b69e655b1925c6911156a2279c75a55df7cc1fc1. 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/QZNWT2158552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7fecc81fc4910eeaf5339860f37e37ba57f4700937fff3189a199a844ebfa7. 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/QZNJW2442252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6f0d22f0d70aaf13ff75642842a417a59b4524ca666c660257c22a6235150a. 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/QZMEV2220172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafca78d02e7174d54603ccd34844d0877236530e2593a750a137c5310b9b5a64. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZTVM2342396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31767071d37cace2b62a17c5646524e2f4cf4a6b4ec0f768f2d993a612ddc754. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:56:56Z), 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/QZW9L2207335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7a76ccb27cef639c4cbbc28abeb0b8272bee743607f40aa6159d4dd8580b05. 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/QZHZ62167974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d37cc8f70dc5f7609feb02860a81a540397e7ad545fcf14da879de17d39f2d. 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/TCAEH1947988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c686ed8c127cab3b197b33b37e359280b74a312c5c06476c271e63d3e7401dd. 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/TCAEH1948004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b5d0e7e56e065fca7b2bb4204ce1c7551170984d23360a6e4759d2013b7bbe. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAEH1948082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9783564e3a27baa2018f00e7bafa9a7d57ba23f75ec2b61eed2c63ebc3afb91d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCAEH1947977.
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 0xed0deed01e1e24cbe7b7db8d35e7f605b7356a82ef79257d6fc9b5ceadddf773. 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/TCAEB1905559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49faeca36f755bd3505a8e8b856ea7d7eaaa46630e2d2432780c1b0a8487f445. 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/TCADG1737717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea38dbffcd24a76dacf0a1dfdf8200c5e7c5cb39805bea9c955b2491dbf17f5c. 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/TCADT1844822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116a8d82df457986052929f6bbb9d07a788ac69344f75531f13c36175ac88e0b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCADQ1893132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08181c06f6070737c31767885749a5a47fd79f2416c28cd91c28104d6e0600d9. 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/TCADN1841150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35df2bb210ab7dcbc66945ed4dc28617144017aff3e919b3b93bc8e0681a79a1. 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/TCADG1725220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c6a8a9342f81866dd9fa313f4045e445524d32154a23a0bf3b011c96d823d7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:47:48Z), 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/TCADG1734428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43dabaeb29feeb7627deeb17d5945878cb90acfc62f27c9a22e64b5336be03b1. 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/TCADN1814338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4637b234fc9ca392d570636dadd4595dd7727383ee8be1af0a4aa00a1228f8f. 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/NLS6R1851586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931120279b3d52b06d7c6f0f97f17140d305b894d63fec3252f8387d1235dee6. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:59:26Z), 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/QZHZ41914413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ff35bedeee083d2feed2b989446649fe118c13b8b611601fa452cdc7a5311f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/PAGU22200005.