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 0xeec77be286b07e9eec576e776d346e0a39e5666494211bb9de703a00405bee82. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d85eebe-bf40-4717-8cf5-18ea13c06f64.json and https://artists.proofprofile.net/proofs/artist/0d85eebe-bf40-4717-8cf5-18ea13c06f64.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 0x5ac5d76017d03e75f2c7f30c43a2eba28e834df062b2b78350afeabef9212a58. 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/BRFPK1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a127638ca442f92de28ae243ebbad05c4b1eb54fd8283ec994f342c22aa4579. 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/BRFPK1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6907eaa2dea1651211581658a2c91d26c25ce985f9fea44fa82be792b44927. 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/BRFPK1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb871a91a330b65c63ebf47e5ad26c9afdf5c8f18441bd9ed70700f9ec0eb3081. 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/BRFPK1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc95db47f5a377199fd6866016ed2af7265246e4ceca76546a7629bbd807148e. 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/BRFPK1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb21c9865bb2f62dbb9cbc5e2c3c6774cdcc812ff9cbd231b726140957d31f0b. 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/BRFPK1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca12d615b53a05bb2be78e3d78dc5aa9274f4ee192c3620ac91b37c8c3256a9. 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/BRFPK1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f578de28bd853f9699deb4f83d1ea6eceae14525f61cd02261bb126b9a7a42. 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/BRFPK1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196a60f55cea9474865d83cc6926f68043b1c6acac959dd2eda7eac32a15dbbd. 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/BRFPK1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5e984c9dacb13213e17ed3e2937ed60623bfba73b07a50b44610353374123f. 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/BRTO62300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3378a5d324de2b10b025e0588bd36d1b6a4763e3a729a743c29d2362d7f621. 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/BRTO62300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33b42c80546f359b445d5a7a067c2fa9329389751b00a9fef85e02d13beaf58. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BRTO62300003.
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 0x4b4a40b69a3c5099118c195e21d9b8c532c21daa64fb68d01474016e67392d83. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BRTO62300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f09d93d7e651c97d3a05dcfd74287866053159e34527c47734ad4b8aad4f06. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BRTO62300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02149352bd7537011ff50a42a23b28b65cb3997b0c70c21eb24666841704f0ef. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BRTO62300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e8fcf03cc15a69eb765fffcfe3e51f04ad446c938725b3ac4a2987f7ba42e6. 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/BRTO62300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1e7c5f04ec27af034c22a90255c29840bed5858417a231526e2f4fc2892849. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BRTO62300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a83927fea5a9c1e730880df5388badac37cb395e89cb9a65a1805b179d0c25. 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/BXCI42300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d447a509dccc2816e0c5cd8a703e575f24c1a9632a88358a73bc751ea69eb53. 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/BXCI42300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa80a39a1aaff96610e0b7354c59d8678761c091354858291830d229a3257176. 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/BXCI42300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e757dc507ba9a2c90cde9cd07685b15d7830507c3150cb87f0c6e179fdbf2f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BXCI42300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1967eef310fceb4df36dab5dd9909eb9a035f8e56df20d3fdd2ea5940e09b22b. 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/BR1HK2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ea2d8e3b2a22fa33db7f0ffc1e70d2f0c93f91f5fa14ac67287ed278248a8a. 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/BC7FD2500004.