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 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 0x2a8dd5b9e9ea0e5b64d1ab11f4929fdfed4765743d67ae07c512d123ee72a4bc. 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/f8904a79-1805-4f3d-8603-3da7b805b57d.json and https://artists.proofprofile.net/proofs/artist/f8904a79-1805-4f3d-8603-3da7b805b57d.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 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 0x06f98d28de0dd6dfcda7f6d64eac61401fb053920e12e9a5378133247d62ce03. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HKG731528297.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b889a58b77267100da73388d3cb87f05f58f6c15cc768f3ee7066e40ef0543. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HKG731528298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68df64495c9094d2064f8350a324f22210fad524ce79aad632f1bed63293f2a6. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/HKG731528300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8529965ef7cd919b5e59f68db93982ef0b3f54f7e9415769b697e57e1bf88519. 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/HKG731528296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed86509e98bb410190c8422f01fd7612fd8bd0a0d9f6a4f9aedd8b63e8f6a7b4. 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/HKG731528299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f98d28de0dd6dfcda7f6d64eac61401fb053920e12e9a5378133247d62ce03. 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/HKG731528297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b889a58b77267100da73388d3cb87f05f58f6c15cc768f3ee7066e40ef0543. 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/HKG731528298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90ea99e87c1b1be6117fc49445dfed87a7bcf5123672976756e112ff36ef6d5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/HKG732340908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23840b13a54388a5ca927854d371b9ec0e32ea252da71c660484d4da03224151. 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/HKG732473133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eff836d95449c81a0cb2f76f8201e7c59073387ca7364a27d123a5e0d2a7e41. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/HKG732504912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb27c816ca516c6753dbf4f339d7053bd73c42157bfc59df72d0176c39c2d461. 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/CNUM72400956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a772bb2531edd2ea8ec818c17283201135d69b1ed1b96052fee2877d93151e1. 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/CNUM72400957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9056e7636e9085051a024f9e2d78ff3584fd1551efca1885b8b3f3abe40cdd. 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/CNUM72400960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1661aac80da9955685f6d740212dfc34c77cfdf902b45d531de1b246e478873. 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/CNUM72400961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e49a5eebe919971a34bc4efd0590c3c15b8c52c7197a2d87352871483eeaa06. 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/CNUM72400962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfcc80fabbd300904ac7a02f9347f22a5aee2fea317feead916ea2d6283f659. 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/CNUM72400963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc369e581b8b980f3a22d5ac4e6f06e010ddcc2cdc94a959aaaeb362e1429092e. 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/CNUM72400964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f535212a5a5235aa147ffe175b2cb159c5361483ca873b90663897b051a6dd. 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/CNUM72400965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ea321fc212a30913b12e2a9c7d72e7268747c9f76df08ccbd7aeee62a6fde9. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CNUM72400966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf06c98f7ad048620dc389a119ffd3b6bc9bb04d42e016d40882d084949305f. 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/HKE022234766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2c0c71f8b254f0158accae0c4837aafe5d8162d770acbb9ba183c25062a2f7. 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/HKE022234725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab3011c57865af41a758178acf0b4fc0eeb0827be983274d2751a81df1c9a2d. 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/HKE022241346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dd8b5bafc3a551b32b6176ab1bea096b5d7aea370e27050abd5733dc83a34c. 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/HKE022258036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237279d9f8ea42385aae7c92e744a402794394f8c390d94e567545be5b206558. 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/TWAE32403310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e52747a54751ab9ec3da7efe1d2cb0c8b68e3fb2e0d2286d5872b9621add83e. 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/HKE022258029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e27020da378d51b2228183c9aea289aa0f298061d20d1451c022097539dc2bd. 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/HKG731620603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d2c648db77cf51075232c73852c938f41f15913d6d578f726b00e24eaf6184. 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/HKG731620605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a84e4e4c8dd14bd90cf8a5afd736b0494564ce617e97d9f5950277c4fc76896. 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/QZZ972340256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060011eaefa8ad870fe77c5e5b84fe209c88ecd97b22fb38c4304d370e016339. 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/HKE022258061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b8c6f45064a6d399c65e6fc7e6e8aeac7cda15d7b6f68b58773ac1e6bf53da. 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/HKE022258066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f419783e6357d216b12c707ad6dbb910ff54b18bc2bc39d77c8ced67f9a37ce. 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/HKE022258071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f034f1cde6fe4c7f7578b952e4b5a0edcc5a7dbf16a9805430ba99c0d36fd38. 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/HKE022234786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca8c2aa49d91f4a71fe5714387bc533841eb83ed56a3f47e7da37242b4f6532. 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/HKG731678397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f02bec5ffe9e816466b0f11d46359b0802b8a5ec3b490ce3711079ac0062935. 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/FR96X2290557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f02bec5ffe9e816466b0f11d46359b0802b8a5ec3b490ce3711079ac0062935. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR96X2290557.