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 0x6f66847709fed44de2f753e234c424f295ac8b3c4162715dfda5ff454dde2598. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb343542-8a7b-485e-a3d9-4b474064bebc.json and https://artists.proofprofile.net/proofs/artist/cb343542-8a7b-485e-a3d9-4b474064bebc.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 0x34dd43bd935db77aa28d71e8976e36e01fe534c827b834bd4f1ecbe884cbda80. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BCJ1H2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4e778e5ed33df6bb6a14ca06397e1a65a5137a91b7807399fd38c2a43cd118. 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/BCJ1H2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8704f49314566cccee4666a8e6a4f1f0bce6da2dfbf0a85543fe648de4dd7e. 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/QZNJW2290832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3977fc44a061165f6de6ed1787472e201731a133b2a10fcd7f9534afe95e55e2. 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/BRMZ72400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d4ea91674178ade1f0b451109b4ab7f09cb7c1d0fb1a8b7c1483165177d54f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRMZ72400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042e470c671a992348db3f1dd2f401e493d8280e268892f3568b9b5b1203ecbc. 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/BRMZ72400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bba40f8bf4a749a1151638a71027bd9b8416fa2666788e691abcc54298475eb. 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/BRMZ72400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c43d51d87385af7e976921ddf0008da7a8b0f6da36d6190d2df5d0e9dbdb787. 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/BRMZ72400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835e61544eb67c223f4573c724b91b596191b36597de796402eeff9abbde36ad. 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/BRMZ72400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd08c3de85b9db21df42f5fa3e8369fb30eb6b011e4609da2854379624ee5253. 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/BRMZ72400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ad2aabad23ecf24002cf3491e0b493351a0d644abf593c1829823ab0ee5627. 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/BRMZ72400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f34b222530b9fbe573e8fbdbb29fa2af9cb065bdfacb34bab835a6a273cf538. 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/BRMZ72400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e724b7378aac93210fab6023a7a20372aaf81a0d432e9857dc03ad8e103208e. 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/BRMZ72400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6fce7d9eb9e5e0eb7ef04ebf8db49c5307c558e326900ee260aa89b31a51b1. 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/BRMZ72400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01450747d884a8b4654aed047fbdfde56cf9a97a2170cb546804b8f4c1a0fb87. 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/BRMZ72400030.