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 0x70173e820ba42c72af1050b776f1024655a624c1486fe035f4e8c1a739a0c75d. Chain 2 (Bitcoin): anchored in block 954027 (2026-06-17T00:55:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/377599e3-d5a8-4d0b-a288-5573f9382533.json and https://artists.proofprofile.net/proofs/artist/377599e3-d5a8-4d0b-a288-5573f9382533.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 0xb9ec726d9de97f0e2486333a9868e4c105cc490ba3d508b5c8b38001246c5b82. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BR10H1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9441b566b9b7e60fe1aca48c44c96e06e6b5bcc585ed168340c505a140d659. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BR10H1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9a76e76c412797d5af41bb14614150d0ed8d65a442f6534df4759f88e8bcfc. 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/BR10H1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf67feaf9a696b8c84122c97b7d62f4b66badbfc5c3f728b30af3fb79141a66. 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/BR10H1100010.
Canções Velhas para Embrulhar Peixes, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4c0753516448b7df6dda6bcf31a0a2861ce36a2cb7d764b9aca48a189e0049. 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/BRUVD1800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d4c2189b3bc7cd2a6dff46b09cc7f7d252de54ed286688d6ff65a9b53ccbba. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRUVD1800012.
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
Canções Velhas para Embrulhar Peixes, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb93569dc685dadd0f00e682d642cbb63b11289133431568cbcd4c9ebc9fa7d. 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/BRUVD1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabd93bd6f265574d129389038fc1ca52a3aa55832112fd1cc3d91d4f8ba0b5a. 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/BRUVD1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcedb5567fcf18f2263b64bf1d2167dfa4fa76755ab48303c49694682a9a2880. 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/BRUVD1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94067ccffe7978aa8c1170ec688725290527663e65b83436d6d8b9855cd05384. 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/BRUVD1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0effbf88c4ab548d5e7cd751f6eebc0320f94349b47d70e2d85a40e71df849. 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/BRUVD1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42eb43c6119cdde72a61f4f1e0ca20ddfa7ad5454ff7bb321c34e3a064ba801f. 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/BRUVD1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24011c1409e8cf3e29992ba1bafd9e24fb4dd127feb4e70a9acb7c55dacf5f22. 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/BRUVD1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fc188def0c7412639c2cc65cf786fe04eb8a9bd51f31c7f6d6c82bd250b2e6. 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/BRUVD1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2a0e9fd007fe40642750cc5118a634bfb80405d5c97385d419e431fa78f1b2. 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/BRUVD1200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ff107ecf601b4858f1300983ff84695c9f38c7e2566bc0f3c4c7402b058e3d. 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/BRUVD1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68aafb92861dc62853bcf009006399cc1702b32da55f0e20587374577c51db6. 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/BRUVD1200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f022b607da03905ce2e48ca5c5bae510ecb7b4f3d41ed09fd83e65ba0e9d75b. 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/BRUVD1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68478276d970372d4380849df4ccf8daa3a441dc0358d63fc0cdc7c3cbc7000b. 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/BRUVD1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee4e216b392b4da4593a882493e7a21e1e00ba5bb5d5d9a8f6946fa7629425e. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/BRUVD1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e015efff37881519cbf835b444aa7fbad622cad18a8259cce8885e17b2ebbe. 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/BRUVD1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4496f11efd8fc5519d51f4516e2b4d5aa871921ef5c90dbb59c6ba9ed16bca. 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/BRUVD1200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a74c9f8f9958d7fa82a6a50107354133368e525c1d11b2e2532224c41aecbd. 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/BR26B1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7976cc174592605c8cb861aa45e6db443a8dc1b52eabeac8de63819eb1a00181. 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/BRZAL2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26747307eb26ec65d4fcb6393c969e5873b8c2b28aefe4e96897cb025e32fbfe. 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/BRZAL2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0a48543e73f070cc5beb5f35fa48158f579487e6fa2e61d11918a09e7b291e. 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/BRZAL2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3d7a75f50461cbbfe374459ea56c03a7d40b3a99be7120c8b759fcf1550149. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRZAL2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb935a2b52c721f605109010627a18413ef12ac2273bfc3e01218eef77c19e17. 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/QZ5AB1781618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f0172f4f7f975ff0dc69c574c0f50d676f67f1d07c99e04cc6a3c4bbaae8c1. 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/QZ5AB1781623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c83947239b9148b3d03fd116af76a30389c6009e5727541b2770e9216bb8c4. 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/BXOO52300008.