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 0xa237168cdf2f6d56e5830fed9e9b9433263264917c3fa0db90c0e82fbf7ef90c. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68294a2f-dd97-4a61-a7cb-726defe8d907.json and https://artists.proofprofile.net/proofs/artist/68294a2f-dd97-4a61-a7cb-726defe8d907.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 0xa7b78097b9135c49381029990f487278ab282f6177bbbef6687e364ef2e0c175. 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/USL4Q1812624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc052f4be91e9f5fa11617768096311a7fee24baecbd4ac1692a705a7558813. 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/USL4Q1812625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffe1962f0fd2787f1e825283902e59a76b7938edad726c54133c1e2c500c7be. 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/USL4Q1812626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383bdc1e44294b6f9aae02c3351710fd7d8a35e64c9dfaddfcd4e41b22b6ca01. 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/USL4Q1812629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3f34e52766c8e524e1d6dd7955df83fe444f85bb17fc1a702c7b57974e426c. 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/USL4Q1812633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4b466f68b5404f4bcefa56683fd4a0a32211160d85346189923e0a5de20e1b. 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/USL4Q1812636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc093305dbc29c94c127bf8c117032c0f618e1822ea4fb193a57e99c78d0a8bf. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USL4Q1812627.
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 0xe5f3364584dba61753b19f97451d6bf9cad553243c43d4f2c058983729649f2e. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USL4Q1812628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ec660fb77a430956930bdf95470423b99638664bcb6bd4fd4f0facffbc5b5b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USL4Q1812630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe5279aee4f3f44e8e205bb56735299b3149ad40bf662e56ecfc2b85854aaef. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USL4Q1812631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd4b5a78ad05a9c688e7d9700ccb9d72c3ed783f82640799560e67d94471128. 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/USL4Q1812632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3ce08adffbb1e6a28f2484c05fc19bd20ee89a50c12b61e46b2516cff9aa93. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/USL4Q1812634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517636d4f274cc635f97b358b5bccb2554d6d8579c21cb9886f2caf904015807. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USL4Q1812635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fb33e95c4cf40de01f897e3ec503f5af0b2c3fc5131b349dc373ab89762edc. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USCGH2049858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ab766f571ef8ec659acce1665d30065a37975b550bb313a2f9bc3b8cdacddd. 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/USDY42413059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48f46109548dfdea9d7649b8f781b806a02a5d5faf78d2be65791bf7d15498a. 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/USDY42413062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43351e47217bf277509384b3fb2bb67042c741f7a1b3beee4ab3f0cf0b347178. 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/USDY42413064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9670d4ea9366e04ab833fb855b9284520c2cf3fb84695772188a6ec6037ad27d. 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/USDY42413065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f57d718b3c2286a29c2e79f0208a25b3e9cd7d3d5762264d469e61fc34594fb. 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/USDY42413067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab0c5d2b27195f72138016e6f5423534f6cf3509f68a02c0c4d60f1506fc1c6. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USDY42413058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054cb30f692856dd7bb8f711bb3567a2ae934eadc1096567af5b0c5de71cc59a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USDY42413060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1e62307fe9356265efc30aa127c6841fed53d152f748a597856e169d5f86de. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USDY42413061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c35cf6c100e424e5b475fa44ffe9a08116936fb1d42eb0ab502ecaf8b516cf8. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USDY42413063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a03e132728afc0167221697e805ab5790d7b36ce24d26bce530b8adb2778ba1. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/USDY42413066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a93cd05c8a9cb4320e7964a28119cf5e4a66399649824492fa907094119485d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:39:06Z), 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/USL4Q2480433.