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 0x3f3159b00b897a64427426ce64ca5ea7789e61600d735a9bed6ba9bd386d01c6. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba70336a-abe3-45e7-96c0-6fb35964ad6f.json and https://artists.proofprofile.net/proofs/artist/ba70336a-abe3-45e7-96c0-6fb35964ad6f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Barnum (Original Broadway Cast Recording)
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 0x6ba500994f41f66997ffcb3a1a34ebae0568f59e66ee91e91480b6bc18f663d7. 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/USSM10204842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d2a305a63c92f21d00346ad4a0862b5c9bd8718c8d33a3b2cb62c333b7b8b2. 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/USSM10204867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e356bd6975f49421195b151b4829bac05f9dfbd488faa9a30874b6c1bc80990. 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/USSM10204845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13f720f594680e9d2525db63c9e26fa930faa9863a7bf16ca9fef43f84fba58. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USSM10204846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78df4f735790c0386df1109fc42cc6eb76668ba3e38dd36fb9e52f2adbc9d45. 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/USSM10204847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4a0c8f6330e8a25490ddd78b599af715bf576f7d64676fd4d021afda526dff. 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/USSM10204848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a4fb5bc84225b660fcebee39b4f6709b0c81b8c60c8841a255ffc7b6c2280e. 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/USSM10204849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f163792ca6750a518ff22f9ac04884101d1408f1b0e09f37a4ca3766064191f. 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/USSM10204850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0983b948e455a55cfd01d5349001218d489b43f011512c76bc35ae6e936b32. 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/USSM10204851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecbcc8557243766659109f9036461ebe15c01581253ba79f0c79edc6f958b78. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USSM10204868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa180abef5e493a68216d092852391169b802135e68fd60957c1d1963bf3d9607. 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/USSM10204855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa849ec54d41c58b38fd73edfb228bd59705410d1404a394fd1de193dd0790755. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/USSM10204857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952aa85c6560f2ca52ca2df10055f271119564fe7c907574b7ad8db498ac958e. 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/USSM10204859.
The Final Event: There Is a Sucker Born Ev'ry Minute (Reprise)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6104c5d3a96fe5230f43bbc872d08949804a509cb457a1bc2e6c4e824507ed6e. 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/USSM10204861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f2b6549b6ad46143f6d949a4b84a2cf8ecdf251734373b482bbf8df857fa48. 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/USSM10204862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddeffa340e137f7627b856f794f4e6d2247eddccc82e30e15c0db34c0fa5725. 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/USSM10204865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e25a15bfd9c2cca19b981783c269ada0d74c56b36d5b3578c0b52345acd79db. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:07:26Z), 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/USSM10204854.
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 0x0b2d8f093e299e619cfb8fce7af72ff5df4654cf0950f275ee15ff315b6a833f. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USSM10204841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c624ad316b3c61ca50a53055072e91dc960bc3e8ab5a137352764f4f930d35d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USSM10204866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2cd0b7cda1d39c2943ec18418529ab5b1ea5add545c4b91e733e0abe96eb70. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/USSM10204869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f7b10472b32cc41517e92b97c8590a8ca242860a0fa64f854567fe384c3413. 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/USSM10204856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda34b724a34bd9616c8966c6aee2de702efc20e2a59934df4740a8b96d5b9900. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USSM10204858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdc08d0b68c85647851ef200cf1bd3f3b8fc249707a46822959db465c287b71. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USSM10204863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99ae5fae83579beb3a9df866bddc8e53ef00fbc0fa120accbb5d029464f6556. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USSM10204864.