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 0x4f00b5cfa2be46b862a1bffe2aa1f0131b0f7f5bf8dae5a06e2fed2916b5274b. 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/1caaa96f-d220-4a73-8e4c-403ed0898437.json and https://artists.proofprofile.net/proofs/artist/1caaa96f-d220-4a73-8e4c-403ed0898437.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 0x3514f22535c930d074343c728cb764f1d99bb8764df9ea869be096975a9f0e08. 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/QZ93L2107271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb63dc9733b1c4a84e92749300052dc6e5a25a31057167479cdf493024f64b5. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZ93L2114306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb05a80d3da844b739cb2fd30f5d9498b062347e7b927397a55d4cc96972107. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USDA12211511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df6da83eecd10dd778130009e0561c7795e082d1fdce1877637f12ff846e032. 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/QZTBF2310598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75db65ebed5fd50dd337db01c55d1021617d2d3007661370a62691d5c104d77b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFZ72461659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7557f077ad36c6fda0301ccfc0d8ca1ed2dcf62b1bfaf49a9d4da84830ed3a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM6MZ2466647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a44be466df009974dbbe3fa396462676191363ca5247b9bb09bc033e6ec9a06. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QM99V2408003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a04edfa3543026b99e0c337f5ba4dcb5e018f8b337bd0709545539e156b5595. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:57Z), 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/QM99V2408004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9327ea8d0166ac81be7aa08f8471d55421c74a60a677f72138c6df72f7db609. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QM99V2408005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d54a6d0dc21f805c4a4c067e7e4a85821994b4abb0a2ccf8614351e82756d61. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:08:41Z), 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/QM99V2408006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7557f077ad36c6fda0301ccfc0d8ca1ed2dcf62b1bfaf49a9d4da84830ed3a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6MZ2466647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7031c1ed2b2b02c5a65a7d51e7e77e3c46366ee2c2b6982eaf5941602615b9. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QMDA72461916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a7ad39ac05f9c76f517b93cd5c96352e660b12ccc340ce1dd881483e443839. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QMDA62446807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fae33931f8c74691b13cee145f6cc063bf060fbe3a0270bbb5aa69e0a51fb57. 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/QM7282480436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7557f077ad36c6fda0301ccfc0d8ca1ed2dcf62b1bfaf49a9d4da84830ed3a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM6MZ2466647.
Best Indie Folk of 2023, Vol. 1 (Indie Folk Central)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c8a619f1238dbe736f6f05eaab0f3b2eb19e917569ce7240dc9c55241ba722. 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/QZTAS2327334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833ba288dea9a094fe892a2b659a6bbfa49702bf9368784f301762447d73d22e. 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/USDA12302094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347a862c88af010f1e9148f35f00ca5fdc42509384a15b143a79cdbd8d1ff639. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM24S2403377.
Dream Song (With Olivia Barton) - alexrainbirdSessions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b28ff47d678eb05dbe0185e5c51f8643aff0864bb44eae80cabd8441e451739. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLS2417833.
Best Indie Folk of 2023, Vol. 2 (Indie Folk Central)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833ba288dea9a094fe892a2b659a6bbfa49702bf9368784f301762447d73d22e. 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/USDA12302094.