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 0xa76f1d8474cd7647e1d07b0aef540929cae636fd5a5a7d253322addef6c7fb7d. 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/0fcfc3d7-3d9e-4c8c-99bb-cd7009e624d1.json and https://artists.proofprofile.net/proofs/artist/0fcfc3d7-3d9e-4c8c-99bb-cd7009e624d1.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 0xa7f825090d870b35078db9da692cf52fe278bfab31c912db38368e9405d667b7. 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/GBWUL1801585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9bec5aa24225c03467bbc4cba73d0e5339605cca42104a7deb36db24afcaec. 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/GBWUL1801613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12321788d1e4c653939288bdd9524fdc7981479c5d7a76c107a6bc0ede47bb9d. 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/GBWUL1801615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d1f66d963458f5f6ced0c61c342611b833a3ed3e75f3f9f16e176109f76b6d. 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/GBWUL1801616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca06363f8f0f6b745cec171927ac0a9090fb8e71727d058355e637b36d24e397. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/GBWUL1801584.
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 0x597410ab4ca327de19ff2f554d0343faa1502b18f0bc82c158e87fb0f59f2b55. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBWUL1801587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5462d48ec24815fcac3a2d8fe92d34deaf141ab1ce9a1ec8d7d29cc125da7971. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBWUL1801617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9608f492f5bc9843e0d9967417e860ad7250f7545fda0350df2c4786d1c5e3be. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBWUL1801618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3329d61eae1b3c0d08c7be33f17adf6b0e4ab71fa6d727d9a1e2ea89dc732c. 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/GBWUL1801619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff44e8208f3405c0e3336d5b633a3318165e52c66445bd621c2a0ef32bfed42. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBWUL1801674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d9fc1fdb70d466aedc6b8ae1e807987696e5829ad5c72e5129c90acbd4d222. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/CA5KR1974769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa8f3159ef27d2c1473f32f9aeec4b49580beaffd07af7953f42d73ef6c0303. 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/TCADE1795991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fa54efbe0ff57e76e7cd779ae6de1555558fd1f630b1e7a378ccf8e6e8158c. 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/QZS1Z1600909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa2ce6a84d9ee9f0e56d85c18e17fa3243088374bf5e0f89bf658fa05799dc7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NL8RL2336940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa2ce6a84d9ee9f0e56d85c18e17fa3243088374bf5e0f89bf658fa05799dc7. 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/NL8RL2336940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e56e60aa9409b80019d9a4417706da716eba51e8a775a0fb95752800e17bdb2. 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/USA2P1700379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bd68a1e5138a59a0e69d09b56b1f9f87683ea12c8983e8a803a9eccdbd67c4. 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/NZDD11600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364050e1a4f8adc677a7e355d850ed1976d502d7216ac982b073085d31263385. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBKQU2352794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f09fe1ce12873d8a4514ad0c1643ecc972d613f82065f03634015c631ab3dc5. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QM42K1833736.