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 0x53f77cc7ec845d6a3f22652af22c720b2b3252bca6a18b07ec814854f549ecc9. 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/9c6f0cc8-1b16-4306-b1e2-b5d77fc9ad3c.json and https://artists.proofprofile.net/proofs/artist/9c6f0cc8-1b16-4306-b1e2-b5d77fc9ad3c.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 0x0d258c1439241e4537183b7bd9be9675fe01ee549b3dd53fe14ae412aa745a29. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/GBLGL0818068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69b8d108e048fc35df1f1289c86f984041247de964ab19b0aea0db0ed2c1010. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBLGL0818069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53053d839a31222f2c007476e0e63f239b08b5ce5c52b6b0d791943d27b01266. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/DEUE22314930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad657841c3eb654e909250a8bb60b6916878fc7aef775fbf29129f9bc8e30b04. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/DEUE22314931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f8abf46c102cdec8ced90cdef6e489d613d61c763223f2c2498c170f2c50c7. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DEUE22314933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfdbdfe7934646ca64bbcddf3729aeda058866f3212a76bb20ebde31dbdec52. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/DEUE22314953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d61b4d86c034be8294cacdef590165499fd5fcebe46faba169d01117fcf908. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AUOM01902672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f6bd4e35ea45bc72b7484e056aede3003d397657e2153b79a2fd5e6a37d874. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AUOM01902680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdce30503f9389af81e3ad9a33f5ec45ea4d9eeadc777488626faabd64be4e84. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AUOM01902684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5fac4219e49e2614f7a82aa6048432e52b51a464ef05f13fe37a50a822eaab. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUOM01902685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d718f25af42eceae5edb9251b8bcfe94dd69fe5d2faa2a12549ee0afe324c29. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/AUOM01902720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66448c58d4ed0db4ceda34b76fa03d7af8318b694d812a06adf7040592fae3c1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AUOM01902721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38690d25a7f7228c8ea11c0f383f4b87c0f2f4c397f04d95abefafdeced40e37. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/AUOM01902734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a968d4079b76ecd90ce81a877751b77ac622159dc2c295aed50a71a09063c47. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/AUOM01902707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14280ed7abe79d9468877ac077f13eeb73e1874bd528d10755f44ce83ffd3a5c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUOM01902738.
Bob Crosby and the Bobcats: The Complete Standard Transcriptions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cef14efcbd5eac60ea06c83c35d56f923b8ebb2f9d4134b39d74f4c519199a7. 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/US53D0429013.
Politics—from 1949 show “Texas, Li’l Darlin”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215c16ed5c1738db0b5842141cc072a0aa156b9b5af9d265e863d5a1184e757c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US53D0429063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4249315f7e95bfcbce3b178644053bcc7d04f824e46171a2189429d2169f419. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/US53D0429211.
Reader's Digest Music: Dixieland Swing: Bob Crosby & His Bobcats
A Jazz Hour With Bob Crosby & The Bobcats: March of the Bobcats
Down Argentine Way - Big Band Favourites
With the Wind and the Rain in Your Hair - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb456f44aebb1db3dae23ae4f95a8cc8a1919bc5f095ef319df2b00f97be29303. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/DEXO71968518.
My Blue Heaven (Rainbow Room Live Version)
Essential Classics, Vol. 312: Bob Crosby & The Bob Cats
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6638ccc5b0615c5a1d803d80fd45e9f3b3cf231853f9649bbd1f480d1b98dfd9. 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/USCXG1501403.