thumb| Bourton-on-the-Water, a village in England. thumb|right|Pacentro, Italy thumb|Strochitsy, Belarus, pictured 2008 thumb|Pornainen, Finland thumb|An Alpine village in the Lötschental valley, Swit
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 0xbcdc48777b0b10bf133d03d0f1b2e802215b24cc3362d12cb01ab81517072dac. 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/98663547-dd59-41be-9760-b561147a3553.json and https://artists.proofprofile.net/proofs/artist/98663547-dd59-41be-9760-b561147a3553.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 0x65dd809c081206bf397eaa14ce610b94ea186fb6dbd2aa81685d074ed2053d19. 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/FRX872436758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb68139cc6769a4ca9d8cdf2a5bb2a4414a0166d97be61fcf7810ca7bf2a96b. 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/FRX282490241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6d34b5a4a2aecc9bac6eead6330241121260b3ddfba6d2c1efe6715f375d49. 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/FR96X2472483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05879a9cae2290f0444cd897084d7b58a42cb2edd4055809c74f98f1ccb15c4. 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/FR2X42441216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fe4f4a597646166253c97d60406daa72942a485a05899a42e1dfd925ccdabd. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/FR10S2474416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fe4f4a597646166253c97d60406daa72942a485a05899a42e1dfd925ccdabd. 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/FR10S2474416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0383b2405ede53e27d3cbbd7cfd40d5f2fff1f1b3b72df81ac1813c2c3317751. 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/DGA0P2316560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d58f47e367a9ebfbbccbabe66e145aafc668fb0b5e09ad5c1ac719e9a4222db. 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/FR2X41809014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434e1eadc2203a0f8836a39c68857e6b7354fb127fd940b569e287a4d58e567c. 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/DGA0M2376159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff47595d2183c48e030968eb1b6ff77dc5931249c06e63b93f684246e4f231c. 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/DGA0M2300797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd0838a1dff983a6f30dea77d1fb333501d91ec7c21924ffd3bcdfdb4c73717. 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/DGA062339402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7d850b42b6b5f5bdb9f01ccef4cab745d1df9acf0b685a5bffcc08935100f0. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:23:41Z), 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/DGA082380381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd0838a1dff983a6f30dea77d1fb333501d91ec7c21924ffd3bcdfdb4c73717. 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/DGA062339402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5138ae5954d13db1aa51396e2f81dfbd756454c3ae8603fb884bbd5b0079b1. 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/FRX872304113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec7476108a8bfdbc0e23e2041bdde2f8e2e4d74dfd2a1a7297a51eeee7143c7. 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/FRX202343789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b3a386ed57a36cb8cc01b70a87139f7e241496e01d8a3275e50e1868a08031. 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/FR2X42348234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf658d8d8aea3779a83dd8e0f45bc9d97c8b175a9d7bef00ceb05c36d8e1cb5b. 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/DGA072246177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41c68dda4b58432416a9ef5a3b85335d3894b566c4a9d632b7396bb853d1774. 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/DGA052277866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41c68dda4b58432416a9ef5a3b85335d3894b566c4a9d632b7396bb853d1774. 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/DGA052277866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac1cae100f25fea17a192ddd8bc60037c66a126af0c4d1e1e6d3454ba7ff404. 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/FRX872235917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71e5eb2bf807e5e4500c014b88c37722b73823b48aa0361d20ecafbb798e6fa. 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/ROCRP2205759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0351a005b8fce98f5c49e5c4caaabf50b9818f6686ff27f07a0ddb31843e0d. 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/FRX202293879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e47f769045b049d27c1c9518212df1305490cd41d3013579d8d142696256f90. 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/FRX762195033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fedf980eee4ae42df7f00b425ed0027e1c96ea6d34de462e0ab63cd0edbf9e3. 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/FRX202152748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa270e3c916759b60982cab74e2879a0eeca79de18e4c540fdd9d388a00f86beb. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ROUM72100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7747dfa2aa20e08dd7f35d5c1719d4c7954c4a9a82fdafeb44312cf2e45cddc6. 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/ROUM72000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6954cd2bd5be54537e10dfb937050c905f4825f2b79d0f2720a6e95f73126801. 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/ROUM72000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac05fe33101ad02400c219a5a8959284e0ae3160a6088f1d4278bde6126b7577. 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/FRX452038227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cddcd3f126e2a0a4bbd8681f0722f06c45d84c0cdf0cb28398ba51d9a9f543. 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/FRX281985596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab7c27d1de0afb823e13e11db8de576e32e6b348ebef0a55b3223d71acb0b09. 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/FRX201920390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0d5774581e46d5484db2436e800bd76935f4e916664112cf804a585f1e68fc. 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/FR2X41951113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8b371f0e49b6eab14c203ed814fba22d710bb8bcea552c0cc274676dc60ddf. 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/FR59R1995257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cfad92820fd7d5fe4996045f87773171d22aa4310333e80f83101cf01d6bd3. 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/FR59R1995258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff10b8fddaab4e8cf086a927c1306fb9001c7b059349d41006fc5a77233b463. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR59R1995259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0654c27324dc7d0e1038f7d724e27f4bf2343029beb97bdf452dde12cc5163b4. 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/FR59R1995260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73300eaba386e969c200d7ffc4b13682b8c78930de44168e3a39d287b3fcc81e. 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/FR59R1931439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0d5774581e46d5484db2436e800bd76935f4e916664112cf804a585f1e68fc. 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/FR2X41951113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efbee0b6be0fb01e2698c47c8c6d12aadb7f11838ed802f7a7edc13e9d5b10d. 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/FR59R1899167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d58f47e367a9ebfbbccbabe66e145aafc668fb0b5e09ad5c1ac719e9a4222db. 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/FR2X41809014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecd6ae4e71104b66e8110ac27266208f4d2661356eec248db9b9e317c11429e. 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/FRX201789285.