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 0x22b13ba237dec1896eb85e88046e0d6afe6f7424bdfbe42e15eca5e08f385609. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17bd68cd-bfb4-4a36-a8c6-376ff8eef501.json and https://artists.proofprofile.net/proofs/artist/17bd68cd-bfb4-4a36-a8c6-376ff8eef501.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 0x02c35085bd0d9f949a71c5c7742d73bff6a28df790b8088646a2928b6e8f33be. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR2X41849822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47381a62d741f6bf6aeac972efdf4376c0ed30b82140b299afc6c080345a2989. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DK2M41400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c559aafffc9bfadc6e0ba4c8728b2f51ffb3f8a719ad3d53087f7796495c18. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DK2M41400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98afa8e377f046be044e40765aa84b6ab946afab302ecdba570863cc5241c7fd. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/FR2X41563572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432e7648a0bb2c7519e0acc4892a39746b4dc8b151d96ca1307fd0e56f88c77f. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DKUM71500300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f1bc7c842017c26d02f7a538fa39957f1f64577fdeb9043678cda44be28537. 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/DKUM71500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c397ad13bbb3707b2d876638de1ca80e882e69280f8b6d0b6829689618c1f3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DKUM71500303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e799f475f0507dd7aedc7a3bf17f56e1a38e99003c1cf2528242af3e85aab8. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DKUM71500304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1552bd1d9bd618ca28e9c3da7c9fc48fb586295b5a51f988dd5b0879240ebe. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DKUM71500305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03078688a526f67d857fbbf48c4f36f4ff6b7742d4fab9bcb4664dae442bbdc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEL021770038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcde1702f103bbf062d0e3e7f1a9f86ae0f5d7d2871b48598c3882f452ceaec9. 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/DEL021770078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16500e4570cb9d5e6c4f3ab95e5d832cd404d28dc89e5956fe8cd1d36d6952c4. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DKUM71900365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8930068b1988412573af5b0a13ef6e66f0bcfa3b977bf604c105687349eb8e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DKUM71900366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df24b516fc1df2594e53f7fdc88f09313c52c9bb097d0f6921f0d7b84d96fb8. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DKUM71900368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78474886f6ec2d7151380e627246ec2f6a35533fec7edea66b05d8dd82cfbf75. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/DKUM71900370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967a048875449c408842da745e1cf180e8e3a79d2779216599c6be6501c17562. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/DEL021970092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200207db3fa0f997df265c72b88b0fd89c4ce36a51180cbc5f0ed653e254131d. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEL022170006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d1db67361cc5daa60412a1a5c401a004bd9021312ee75026d997a83e13d476. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEL022270042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62759ea77129925462f09a9f45bb2443aaeddc212fd77ac9e15b2da68e71b276. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/DEL022370017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22da3435634e82660d9e8bfe957a0126ee83b114c872e7b472f1e9addf4696d8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEL022370018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62759ea77129925462f09a9f45bb2443aaeddc212fd77ac9e15b2da68e71b276. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DEL022370017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d1db67361cc5daa60412a1a5c401a004bd9021312ee75026d997a83e13d476. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEL022270042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b013df6f623fc0d5a5bc22b706d0fc2f47c2c8639a1bee19a8cc14a51ce108. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DKD8C2400101.