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 0xf38ff1c6888519b7999dfcd909744583c1d215e1517e8f01a56febb0c2b84ca1. 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/42b1adf6-4c83-447e-85bd-07c514766efb.json and https://artists.proofprofile.net/proofs/artist/42b1adf6-4c83-447e-85bd-07c514766efb.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 0xb966bd1cd1ed5434de66ca1480fd0214e34500618e064aba999a46fe76b9626f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZAL62300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddafc09bd011bb7afc22eeb86b68990bee671944cd7f74043304ff963032408. 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/QZAL62300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09825c63507b3bbe914c52cb031cb00df97b3506198d7d02e0eb0401a64f0aab. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZAL62300007.
Sometimes Late at Night (The Piano Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda424207d4f8d0ebbd9843df86b1e7e641a18ab7514d3e39e7ff053008f6eac5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZAL62300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba0083138c826b1fa0a9c2026dd4b667f87430cc17f94931d3474e08131cc4b. 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/QZAL62300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364574e670516f2857f3d00867db9975e7a6f78680755949ed0ee3a6590945cc. 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/QZAL62300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b57c87621c795e6f3e8a72b261660aa76731b41cd2055834d015a54f34cbe9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZAL62300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c031ef8569cd9366cbcf9137a09651641168735722d0a316f4892a9d264a18b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZAL62300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d1a87360d59b03c3d9babdb68b32b4b22515fdf60112a5dfc2581fabf4fea7. 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/QZAL62200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb913a8d8634eb7138d9d112f42ce0d33fa48fb4ad1312e1a7da77710c04c18e. 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/QZAL62200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3881c3066d1abd728969e44646d9634be6e93af5031cfb6b5a75a412ccf2a80b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:24:12Z), 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/QZAL62100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812373264d13efe3f9037069ca9a7e81b844ed35d946f6a233d59419b237e313. 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/QZAL62000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c9089d027e26751611a9a3c2b1fa0646d431cf51a90073aacecdd9d28adf7f. 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/QZAL62300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d1a87360d59b03c3d9babdb68b32b4b22515fdf60112a5dfc2581fabf4fea7. 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/QZAL62200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefb18bec49c0fe8389c5de2f5c0312a6d544b6df2851d741b4246957f4927ca. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:22:21Z), 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/QZAL62200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8605de6f1b8c057292400b7ee698a8241314241f2cced151cc4ff951a55f64c. 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/QZAL62200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb913a8d8634eb7138d9d112f42ce0d33fa48fb4ad1312e1a7da77710c04c18e. 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/QZAL62200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994baf2bf4d17a212334f7ce8ca0d85bcd77121004b8aa774cbf57a80f7f40fc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZAL62200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850596fdf993acd037a551f5cbb1b28ddc203c8a88cd91097d570b765ff7258c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZAL62200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3881c3066d1abd728969e44646d9634be6e93af5031cfb6b5a75a412ccf2a80b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZAL62100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa0edcee07789a7c04b3e872162b871db835c358212ea3cb33d229939b29f74. 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/QZAL62100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81e9526bd030e69f3bad7334f28415924e62f4ace67e450186f171161c9d608. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZAL62100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dc09f25940e31533f36f5b89fda0d3e9a581832cfd3b8a9d647f4094eaa038. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZAL62100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff63aa2b52273fada1313115a302682cc81b62406e898ec34a18548e38f16ae2. 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/QZAL62100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fac2a860624e094a369eb274500a187ee8c7ba05bc36491c34d2c522b738e5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:54:04Z), 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/QZAL62100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b34123d8046ff6a7d2b2d8dcbbcac9bd328223ac72cb974931b4127b31e9bfa. 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/QZAL62000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63bfaf839a047be7ad877d506dd6ee6f25b8830a60827699cd863b886b9a5f0. 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/QZAL62000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812373264d13efe3f9037069ca9a7e81b844ed35d946f6a233d59419b237e313. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZAL62000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e41b6d29dbb43bb039f6b546e44c1e95d931a50b5cc054037e5bd518afe21dc. 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/QZAL61900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83aefdd6b248b24e89b13bbf97b242e252bd78e04d1dbe1e0c7cb8a20b9ea6d3. 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/QZAL61900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e41b6d29dbb43bb039f6b546e44c1e95d931a50b5cc054037e5bd518afe21dc. 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/QZAL61900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e40e7d03fb1a7c444cbeb4b42a5ca84122c0f83b0e75226cab4a699e4e4b18a. 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/QZAL61900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac9896f8567dab5ef0fcbeae2c16cddda8296ba1fc7b0faf5e1354a3c028687. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/QZAL61900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83aefdd6b248b24e89b13bbf97b242e252bd78e04d1dbe1e0c7cb8a20b9ea6d3. 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/QZAL61900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6669340f36b985f8a2382ce9a7c7981a3c27696d2382c59fdde5274d687563. 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/TCADF1732336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80cfd6b2e4896ebad7b30eca2a3918d853c66f98d3ac8170322b9edbc89988c. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/TCACP1607961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63c6facd34bfb4f4946cb3a58e61437ba402d74c30eb06ac6a18a62899deede. 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/QMEBB1300001.